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Old 17-05-2010, 09:25 PM
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Post Have I seriously damaged my mower?

Can anyone help please? When I was mowing, I ran over a largish stone. The mower made a noise like the stone was whizzing around with the blades then white smoke came out of the exhaust. When I stopped the mower, I tilted it up (only slightly) to see if the stone was still underneath, didn't see it but saw score marks where it had been. The blades still move OK. When I started the mower again, it sounded like a tin can and there was a bit of oil coming out of the exhaust. Have I done serious damage? What should I be checking next? The mower is only 2 years old.
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Old 18-05-2010, 01:58 AM posted to alt.home.lawn.garden
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Default Have I seriously damaged my mower?


"Helen4521" wrote in message
...

Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like a
tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is only 2
years old.




--
Helen4521


Ouch! yup

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Old 18-05-2010, 07:49 AM posted to alt.home.lawn.garden
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Posts: 762
Default Have I seriously damaged my mower?

Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


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Old 18-05-2010, 03:53 PM posted to alt.home.lawn.garden
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Posts: 431
Default Have I seriously damaged my mower?

On May 18, 1:49*am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix. I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that on
Ebay.
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Old 18-05-2010, 05:05 PM posted to alt.home.lawn.garden
jim jim is offline
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First recorded activity by GardenBanter: May 2009
Posts: 6
Default Have I seriously damaged my mower?



wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.



That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.




I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.

-jim


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Old 19-05-2010, 01:21 PM
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First recorded activity by GardenBanter: Oct 2009
Posts: 31
Default

Quote:
Originally Posted by jim View Post
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.



That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.




I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.

-jim
I'm with Jim on this one but it is still possible that the crankshaft & blade are bent.... a bent blade will sometimes compensate for the bend in the crankshaft and the machine will run semi-true. If the blade is replaced for a new one the vibration may become more apparent.

This is all dependant of what the machine is though..... if its a Honda with a Rotostop Clutch the crank could be fine but the clutch could be damaged causing the "tin can" sound? More information required please.

Lawnmower World - The home of Quality garden machinery
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Old 19-05-2010, 02:42 PM posted to alt.home.lawn.garden
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First recorded activity by GardenBanter: Jul 2006
Posts: 431
Default Have I seriously damaged my mower?

On May 18, 11:05*am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.

I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. *If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. * That usually gets people
interested. *I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK. *

-jim- Hide quoted text -

- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?
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Old 20-05-2010, 03:01 AM posted to alt.home.lawn.garden
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First recorded activity by GardenBanter: Jul 2006
Posts: 846
Default Have I seriously damaged my mower?

said:

On May 18, 11:05*am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.

I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. *If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. * That usually gets people
interested. *I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK. *

-jim- Hide quoted text -

- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?


Maybe it only /looked/ like it was coming out of the exhaust at that time, and
it was actually the dust from the rock disintegrating. =)

What, in an air-cooled engine, do you think would cause *white* smoke coming
from an exhaust port? =)
--

Eggs

When the only tool you own is a hammer, every problem begins to look like a
nail.
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Old 20-05-2010, 07:24 PM posted to alt.home.lawn.garden
jim jim is offline
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First recorded activity by GardenBanter: May 2009
Posts: 6
Default Have I seriously damaged my mower?



wrote:

On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.

I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.

-jim- Hide quoted text -

- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?



Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. How
would you explain it?

-jim
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Old 21-05-2010, 10:48 AM posted to alt.home.lawn.garden
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First recorded activity by GardenBanter: Jul 2006
Posts: 431
Default Have I seriously damaged my mower?

On May 20, 1:24*pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish stone.
The mower made a noise like the stone was whizzing around with the
blades then white smoke came out of the exhaust. When I stopped the
mower, I tilted it up (only slightly) to see if the stone was still
underneath, didn't see it but saw score marks where it had been.. The
blades still move OK. When I started the mower again, it sounded like
a tin can and there was a bit of oil coming out of the exhaust. Have I
done serious damage? What should I be checking next? The mower is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will find that the
crankshaft is bent, causing one end of the blade to be higher than the other.


With oil coming out the exhaust after hitting a large rock, you have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with a
sheared key will ruin it. Fixing a sheared key shouldn't cost very much.


I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. *If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on Ebay..
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. * That usually gets people
interested. *I'm amazed at what people will bid on crap like that on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared flywheel
key or the blade hitting some piece of sheet metal might sound something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.


-jim- Hide quoted text -


- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?


Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. *How
would you explain it?

-jim- Hide quoted text -

- Show quoted text -


The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.

Perhaps we'll hear back about how it turns out.


  #11   Report Post  
Old 21-05-2010, 01:18 PM posted to alt.home.lawn.garden
external usenet poster
 
First recorded activity by GardenBanter: May 2010
Posts: 1
Default Have I seriously damaged my mower?

Depends what side the mower is tipped.

wrote in message
...
On May 20, 1:24 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish
stone.
The mower made a noise like the stone was whizzing around with
the
blades then white smoke came out of the exhaust. When I stopped
the
mower, I tilted it up (only slightly) to see if the stone was
still
underneath, didn't see it but saw score marks where it had
been. The
blades still move OK. When I started the mower again, it
sounded like
a tin can and there was a bit of oil coming out of the exhaust.
Have I
done serious damage? What should I be checking next? The mower
is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will
find that the
crankshaft is bent, causing one end of the blade to be higher
than the other.


With oil coming out the exhaust after hitting a large rock, you
have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase
breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with
a
sheared key will ruin it. Fixing a sheared key shouldn't cost very
much.


I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on
Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that
on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared
flywheel
key or the blade hitting some piece of sheet metal might sound
something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.


-jim- Hide quoted text -


- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?


Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. How
would you explain it?

-jim- Hide quoted text -

- Show quoted text -


The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.

Perhaps we'll hear back about how it turns out.


  #12   Report Post  
Old 21-05-2010, 04:10 PM posted to alt.home.lawn.garden
external usenet poster
 
First recorded activity by GardenBanter: Mar 2010
Posts: 3
Default Have I seriously damaged my mower?

On Fri, 21 May 2010 07:18:04 -0400, "Joe" [email protected] wrote:

Depends what side the mower is tipped.

wrote in message
...
On May 20, 1:24 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish
stone.
The mower made a noise like the stone was whizzing around with
the
blades then white smoke came out of the exhaust. When I stopped
the
mower, I tilted it up (only slightly) to see if the stone was
still
underneath, didn't see it but saw score marks where it had
been. The
blades still move OK. When I started the mower again, it
sounded like
a tin can and there was a bit of oil coming out of the exhaust.
Have I
done serious damage? What should I be checking next? The mower
is
only 2 years old.

Pull the plug wire, and rotate the blade. Chances are, you will
find that the
crankshaft is bent, causing one end of the blade to be higher
than the other.

With oil coming out the exhaust after hitting a large rock, you
have
serious damage and it isn't going to be cheap to fix.

That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase
breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with
a
sheared key will ruin it. Fixing a sheared key shouldn't cost very
much.

I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on
Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that
on
Ebay.

Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared
flywheel
key or the blade hitting some piece of sheet metal might sound
something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.

-jim- Hide quoted text -

- Show quoted text -

If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?

Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. How
would you explain it?

-jim- Hide quoted text -

- Show quoted text -


The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.

Perhaps we'll hear back about how it turns out.



I had a customer come in a couple months ago, kinda the same
situation, except his wouldnt start at all, leaked oil out of the
muffler and carburetor. I went ahead and replaced the sheared flywheel
key, primed it, and fired it up. Smoked lick heck for about a minute,
then cleared up and ran great, no knocks, vibration, ill effects, etc.
Ran a compression check and a leakdown test with great results. I have
seen other mowers, and even a tiller, in the past with the same thing.
Hit something, sudden stop, oil in the muffler and or carb, but no
mechanical damage. All I can guess is a sudden change in crankcase
pressure to the high positive is causing oil to blow past either the
rings or valve guides and blow out both ends...kinda like when you
cough and f@rt at the same time.....it happens....Midnite

nuevolawnandgarden at verizon dot net
nuevolawnandgarden.webs.com
  #13   Report Post  
Old 21-05-2010, 06:54 PM posted to alt.home.lawn.garden
jim jim is offline
external usenet poster
 
First recorded activity by GardenBanter: May 2009
Posts: 6
Default Have I seriously damaged my mower?



s wrote:

On Fri, 21 May 2010 07:18:04 -0400, "Joe" [email protected] wrote:

Depends what side the mower is tipped.

wrote in message
...
On May 20, 1:24 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish
stone.
The mower made a noise like the stone was whizzing around with
the
blades then white smoke came out of the exhaust. When I stopped
the
mower, I tilted it up (only slightly) to see if the stone was
still
underneath, didn't see it but saw score marks where it had
been. The
blades still move OK. When I started the mower again, it
sounded like
a tin can and there was a bit of oil coming out of the exhaust.
Have I
done serious damage? What should I be checking next? The mower
is
only 2 years old.

Pull the plug wire, and rotate the blade. Chances are, you will
find that the
crankshaft is bent, causing one end of the blade to be higher
than the other.

With oil coming out the exhaust after hitting a large rock, you
have
serious damage and it isn't going to be cheap to fix.

That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase
breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with
a
sheared key will ruin it. Fixing a sheared key shouldn't cost very
much.

I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on
Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like that
on
Ebay.

Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared
flywheel
key or the blade hitting some piece of sheet metal might sound
something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.

-jim- Hide quoted text -

- Show quoted text -

If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?

Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. How
would you explain it?

-jim- Hide quoted text -

- Show quoted text -

The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.

Perhaps we'll hear back about how it turns out.


I had a customer come in a couple months ago, kinda the same
situation, except his wouldnt start at all, leaked oil out of the
muffler and carburetor. I went ahead and replaced the sheared flywheel
key, primed it, and fired it up. Smoked lick heck for about a minute,
then cleared up and ran great, no knocks, vibration, ill effects, etc.
Ran a compression check and a leakdown test with great results. I have
seen other mowers, and even a tiller, in the past with the same thing.
Hit something, sudden stop, oil in the muffler and or carb, but no
mechanical damage. All I can guess is a sudden change in crankcase
pressure to the high positive is causing oil to blow past either the
rings or valve guides and blow out both ends...kinda like when you
cough and f@rt at the same time.....it happens....Midnite


Yeah that sounds typical, but I still say any oil that ends up in the
muffler got there by getting into the intake through the breather. The
same inertia that will shear the flywheel key (and/or bend the crank)
will toss the crankcase oil where it normally doesn't get tossed.

-jim




nuevolawnandgarden at verizon dot net
nuevolawnandgarden.webs.com

  #14   Report Post  
Old 24-05-2010, 02:02 PM posted to alt.home.lawn.garden
external usenet poster
 
First recorded activity by GardenBanter: Jul 2006
Posts: 431
Default Have I seriously damaged my mower?

On May 21, 12:54*pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On Fri, 21 May 2010 07:18:04 -0400, "Joe" [email protected] wrote:


Depends what side the mower is tipped.


wrote in message
....
On May 20, 1:24 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a largish
stone.
The mower made a noise like the stone was whizzing around with
the
blades then white smoke came out of the exhaust. When I stopped
the
mower, I tilted it up (only slightly) to see if the stone was
still
underneath, didn't see it but saw score marks where it had
been. The
blades still move OK. When I started the mower again, it
sounded like
a tin can and there was a bit of oil coming out of the exhaust.
Have I
done serious damage? What should I be checking next? The mower
is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you will
find that the
crankshaft is bent, causing one end of the blade to be higher
than the other.


With oil coming out the exhaust after hitting a large rock, you
have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is probably
caused by tipping the engine and getting oil into the crankcase
breather
and then sucked into the engine. If the engine is running badly it is
probably because the flywheel key is sheared. Running the engine with
a
sheared key will ruin it. Fixing a sheared key shouldn't cost very
much.


I'd try to get
a rough estimate over the phone on the repair cost range before
spending money on fixing it. *If it's a low to mid-range mower, you
may be better off buying a new one and parting this one out on
Ebay.
Start with the engine and tell them you hit a rock and it no longer
runs, all sales final, as is, etc. * That usually gets people
interested. *I'm amazed at what people will bid on crap like that
on
Ebay.


Except that she said it still ran but sounded like a tin can. I'm not
sure what exactly "sounded like a tin can" means, but a sheared
flywheel
key or the blade hitting some piece of sheet metal might sound
something
like that to some people. Since there was no mention of excessive
vibration I would guess the crankshaft is OK.


-jim- Hide quoted text -


- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower over
for inspection, how do you explain the white smoke coming out of the
exhaust that suddenly appeared when she hit the rock?


Pretty much the same mechanism. The smoke was the result of a slug of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is. *How
would you explain it?


-jim- Hide quoted text -


- Show quoted text -


The poster said she "only slightly tipped" the mower. * She didn't
turn *it upside down. *I've tipped many mowers over on their side and
never had any white smoke come out. *In fact, that is how you change
the oil on most of them today. *The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. * I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless something
is broken internally.


Perhaps we'll hear back about how it turns out.


I had a customer come in a couple months ago, kinda the same
situation, except his wouldnt start at all, leaked oil out of the
muffler and carburetor. I went ahead and replaced the sheared flywheel
key, primed it, and fired it up. Smoked lick heck for about a minute,
then cleared up and ran great, no knocks, vibration, ill effects, etc.
Ran a compression check and a leakdown test with great results. I have
seen other mowers, and even a tiller, in the past with the same thing.
Hit something, sudden stop, oil in the muffler and or carb, but no
mechanical damage. All I can guess is a sudden change in crankcase
pressure to the high positive is causing oil to blow past either the
rings or valve guides and blow out both ends...kinda like when you
cough and f@rt at the same time.....it happens....Midnite


Yeah that sounds typical, but I still say any oil that ends up in the
muffler got there by getting into the intake through the breather. The
same inertia that will shear the flywheel key (and/or bend the crank)
will toss the crankcase oil where it normally doesn't get tossed.

-jim





nuevolawnandgarden at verizon dot net
nuevolawnandgarden.webs.com- Hide quoted text -


- Show quoted text -- Hide quoted text -

- Show quoted text -


Those explanations of smoke without major damage sound plausible. If
we're lucky the OP will report back on how she makes out.
  #15   Report Post  
Old 01-09-2010, 08:08 AM posted to alt.home.lawn.garden
external usenet poster
 
First recorded activity by GardenBanter: Sep 2010
Posts: 1
Default Have I seriously damaged my mower?

Visit www.superaffiliate7.com, you like this web site

wrote in message
...
On May 21, 12:54 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:

On Fri, 21 May 2010 07:18:04 -0400, "Joe" [email protected] wrote:


Depends what side the mower is tipped.


wrote in message
...
On May 20, 1:24 pm, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 11:05 am, jim "sjedgingN0Sp"@m@mwt,net wrote:
wrote:


On May 18, 1:49 am, "Bob F" wrote:
Helen4521 wrote:
Can anyone help please? When I was mowing, I ran over a
largish
stone.
The mower made a noise like the stone was whizzing around
with
the
blades then white smoke came out of the exhaust. When I
stopped
the
mower, I tilted it up (only slightly) to see if the stone
was
still
underneath, didn't see it but saw score marks where it had
been. The
blades still move OK. When I started the mower again, it
sounded like
a tin can and there was a bit of oil coming out of the
exhaust.
Have I
done serious damage? What should I be checking next? The
mower
is
only 2 years old.


Pull the plug wire, and rotate the blade. Chances are, you
will
find that the
crankshaft is bent, causing one end of the blade to be
higher
than the other.


With oil coming out the exhaust after hitting a large rock,
you
have
serious damage and it isn't going to be cheap to fix.


That is probably not true. The oil coming out the exhaust is
probably
caused by tipping the engine and getting oil into the crankcase
breather
and then sucked into the engine. If the engine is running badly
it is
probably because the flywheel key is sheared. Running the engine
with
a
sheared key will ruin it. Fixing a sheared key shouldn't cost
very
much.


I'd try to get
a rough estimate over the phone on the repair cost range
before
spending money on fixing it. If it's a low to mid-range mower,
you
may be better off buying a new one and parting this one out on
Ebay.
Start with the engine and tell them you hit a rock and it no
longer
runs, all sales final, as is, etc. That usually gets people
interested. I'm amazed at what people will bid on crap like
that
on
Ebay.


Except that she said it still ran but sounded like a tin can.
I'm not
sure what exactly "sounded like a tin can" means, but a sheared
flywheel
key or the blade hitting some piece of sheet metal might sound
something
like that to some people. Since there was no mention of
excessive
vibration I would guess the crankshaft is OK.


-jim- Hide quoted text -


- Show quoted text -


If the oil coming out of the exhaust is due to tipping the mower
over
for inspection, how do you explain the white smoke coming out of
the
exhaust that suddenly appeared when she hit the rock?


Pretty much the same mechanism. The smoke was the result of a slug
of
oil getting through the crankshaft breather. To be any more specific
than that, would require knowing what sort of engine/mower this is.
How
would you explain it?


-jim- Hide quoted text -


- Show quoted text -


The poster said she "only slightly tipped" the mower. She didn't
turn it upside down. I've tipped many mowers over on their side and
never had any white smoke come out. In fact, that is how you change
the oil on most of them today. The white exhaust smoke also appeared
right after hitting the rock while the mower was still running and
before turning it upside down. I don't see how hitting a rock,
accounts for oil getting into the combustion chamber, unless
something
is broken internally.


Perhaps we'll hear back about how it turns out.


I had a customer come in a couple months ago, kinda the same
situation, except his wouldnt start at all, leaked oil out of the
muffler and carburetor. I went ahead and replaced the sheared flywheel
key, primed it, and fired it up. Smoked lick heck for about a minute,
then cleared up and ran great, no knocks, vibration, ill effects, etc.
Ran a compression check and a leakdown test with great results. I have
seen other mowers, and even a tiller, in the past with the same thing.
Hit something, sudden stop, oil in the muffler and or carb, but no
mechanical damage. All I can guess is a sudden change in crankcase
pressure to the high positive is causing oil to blow past either the
rings or valve guides and blow out both ends...kinda like when you
cough and f@rt at the same time.....it happens....Midnite


Yeah that sounds typical, but I still say any oil that ends up in the
muffler got there by getting into the intake through the breather. The
same inertia that will shear the flywheel key (and/or bend the crank)
will toss the crankcase oil where it normally doesn't get tossed.

-jim





nuevolawnandgarden at verizon dot net
nuevolawnandgarden.webs.com- Hide quoted text -


- Show quoted text -- Hide quoted text -

- Show quoted text -


Those explanations of smoke without major damage sound plausible. If
we're lucky the OP will report back on how she makes out.



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