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engine running fast...Briggs and stratton 35 classic petrol
(Briggs and stratton 35 classic petrol )
Following on from my previous post regarding flywheel removal and and rebuild. I am pleased to say everything is back together and it starts, however it seems to run much faster than it previously did, I don`t think there is much room for adjustments to the carburetor so thinking maybe there is something I haven`t put back together properly the only parts that I might have got wrong are the 2 springs that are attached to the carb which I think are something to do with it. Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. Any help appreciated. thanks |
#2
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engine running fast...Briggs and stratton 35 classic petrol
"S" wrote:
only parts that I might have got wrong are the 2 springs that are attached to the carb which I think are something to do with it. This will be kind of generic: The usual scheme is that the throttle control cable connects to some sort of governor, which then connects via springs to the carb. So when you open the "throttle," you're really telling the governor what speed you want, and the governor controls the throttle plate in the carb. Governor adjustment generally involves loosening a set screw/clamp and adjusting the position of a plate on the governor shaft that sticks out of the engine. The spring adjustment usually minimizes "hunting" or speed surging. You well might be able to find a diagram on line of how things connect. Gary Woods AKA K2AHC- PGP key on request, or at home.earthlink.net/~garygarlic Zone 5/6 in upstate New York, 1420' elevation. NY WO G |
#3
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engine running fast...Briggs and stratton 35 classic petrol
In message , S
wrote (Briggs and stratton 35 classic petrol ) Following on from my previous post regarding flywheel removal and and rebuild. I am pleased to say everything is back together and it starts, however it seems to run much faster than it previously did, I don`t think there is much room for adjustments to the carburetor so thinking maybe there is something I haven`t put back together properly the only parts that I might have got wrong are the 2 springs that are attached to the carb which I think are something to do with it. Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. Any help appreciated. thanks Does this help? http://www.amac.f2s.com/spring/index.htm it's a slightly ***** spring but I believe it's in the correct place (lawnmower scrapped as there is more rust than metal). make sure that the triangular bit that the wire link fits into moves freely and its easy to get it the wrong side of the end stop lug (which should be in the middle -- Alan news2006 {at} amac {dot} f2s {dot} com |
#4
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engine running fast...Briggs and stratton 35 classic petrol
"Alan" wrote in message ... In message , S wrote (Briggs and stratton 35 classic petrol ) Following on from my previous post regarding flywheel removal and and rebuild. I am pleased to say everything is back together and it starts, however it seems to run much faster than it previously did, I don`t think there is much room for adjustments to the carburetor so thinking maybe there is something I haven`t put back together properly the only parts that I might have got wrong are the 2 springs that are attached to the carb which I think are something to do with it. Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. Any help appreciated. thanks Does this help? http://www.amac.f2s.com/spring/index.htm it's a slightly ***** spring but I believe it's in the correct place (lawnmower scrapped as there is more rust than metal). make sure that the triangular bit that the wire link fits into moves freely and its easy to get it the wrong side of the end stop lug (which should be in the middle -- Alan Thanks Alan, that answers 50% of my question as there is another spring, the one you have pictured looks correct as per mine but the other spring connects as follows. On your picture on the spring that is ******** at the end of the ****** coiled end , just above it there is a metal triangular part, the other spring I am sure connects to that but the other end connects where? I might be wrong but I can just make out the end of the other spring in your picture on that triangular part. |
#5
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engine running fast...Briggs and stratton 35 classic petrol
In message , S
wrote Thanks Alan, that answers 50% of my question as there is another spring, the one you have pictured looks correct as per mine but the other spring connects as follows. On your picture on the spring that is ******** at the end of the ****** coiled end , just above it there is a metal triangular part, the other spring I am sure connects to that but the other end connects where? I might be wrong but I can just make out the end of the other spring in your picture on that triangular part. More pictures on the same link including one where the other spring (or more correctly thick link wire) is removed at one end. http://www.amac.f2s.com/spring/index.htm If the wire link is fitted the wrong way around then the adjustment can stick in the 'fast' position. Been there and got the T-shirt The are no other springs on my carb but that doesn't mean that B&S don't have more than one arrangement. -- Alan news2006 {at} amac {dot} f2s {dot} com |
#6
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engine running fast...Briggs and stratton 35 classic petrol
Aha! I think this is where I might have got it wrong, picture link below of
mine. http://tinypic.com/view.php?pic=29clzwi&s=4 "Alan" wrote in message ... In message , S wrote Thanks Alan, that answers 50% of my question as there is another spring, the one you have pictured looks correct as per mine but the other spring connects as follows. On your picture on the spring that is ******** at the end of the ****** coiled end , just above it there is a metal triangular part, the other spring I am sure connects to that but the other end connects where? I might be wrong but I can just make out the end of the other spring in your picture on that triangular part. More pictures on the same link including one where the other spring (or more correctly thick link wire) is removed at one end. http://www.amac.f2s.com/spring/index.htm If the wire link is fitted the wrong way around then the adjustment can stick in the 'fast' position. Been there and got the T-shirt The are no other springs on my carb but that doesn't mean that B&S don't have more than one arrangement. -- Alan news2006 {at} amac {dot} f2s {dot} com |
#7
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engine running fast...Briggs and stratton 35 classic petrol
In message , S
wrote Aha! I think this is where I might have got it wrong, picture link below of mine. http://tinypic.com/view.php?pic=29clzwi&s=4 My guess is that spring 2 lives somewhere else -- Alan news2006 {at} amac {dot} f2s {dot} com |
#8
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engine running fast...Briggs and stratton 35 classic petrol
I agree Alan, this is the original picture taken as I was dismantling and
before the springs were removed, however the picture is not too clear as to the exact location as to where the ends are located. It is roughly all in the same area though. http://tinypic.com/view.php?pic=15pg0fr&s=4 "Alan" wrote in message ... In message , S wrote Aha! I think this is where I might have got it wrong, picture link below of mine. http://tinypic.com/view.php?pic=29clzwi&s=4 My guess is that spring 2 lives somewhere else -- Alan news2006 {at} amac {dot} f2s {dot} com |
#9
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engine running fast...Briggs and stratton 35 classic petrol
On Fri, 31 Oct 2008 14:33:27 -0000, S wrote:
Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. I'd go for the springs being wrong somehow. I'd go out and photograph mine but it's dark, it's cold, and I think I'd have to take a cover off to see the springs... I also have a sneaky suspicion there might be three springs but one could be linkage to the paddle blown by the engine fan that opens the throttle if the revs drop. -- Cheers Dave. |
#10
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engine running fast...Briggs and stratton 35 classic petrol
On Fri, 31 Oct 2008 17:57:56 +0000, Alan wrote:
My guess is that spring 2 lives somewhere else Yes it doesn't "look right" just hooked on the the end of the lever from the fan paddle. If there was notch for it to it in it would be different but there is nothing to stop it wandering about. Begger it I've been out. The left hand end of spring 2 should be in the loop of the linkage along with the left hand end of spring 1. My spring 2 has long closed loops at each end and is very sloppy without the engine running. -- Cheers Dave. |
#11
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engine running fast...Briggs and stratton 35 classic petrol
having messed about with it a bit more I am still at a loss as to how to
locate the springs, however if I start it up and the engine racing if I manually push the lever that is linked to the regulator (paddle) then the revs drop so somehow the springs manage the settings, but damned if I know how. Going by the photographs i took while dismantling as far as I am aware there are 2 springs and a linkage to the paddle. going by your and my photographs the larger spring does locate on the `paddle` and I have one anchor point for the other spring, the other end of this spring I have anchored at the same point as the other ie on to the linkage part for the paddle, this seems the only logical place for it but it does not make sense to me. I am sure it should be anchored else where but there does not seem to be an obvious (other) anchor point. Like you its now to B....y cold to continue, tomorrow will be soon enough. regards "Dave Liquorice" wrote in message ll.net... On Fri, 31 Oct 2008 14:33:27 -0000, S wrote: Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. I'd go for the springs being wrong somehow. I'd go out and photograph mine but it's dark, it's cold, and I think I'd have to take a cover off to see the springs... I also have a sneaky suspicion there might be three springs but one could be linkage to the paddle blown by the engine fan that opens the throttle if the revs drop. -- Cheers Dave. |
#12
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engine running fast...Briggs and stratton 35 classic petrol
I will hook the smaller spring up to the `loop` tomorrow and see what
happens. "S" wrote in message ... having messed about with it a bit more I am still at a loss as to how to locate the springs, however if I start it up and the engine racing if I manually push the lever that is linked to the regulator (paddle) then the revs drop so somehow the springs manage the settings, but damned if I know how. Going by the photographs i took while dismantling as far as I am aware there are 2 springs and a linkage to the paddle. going by your and my photographs the larger spring does locate on the `paddle` and I have one anchor point for the other spring, the other end of this spring I have anchored at the same point as the other ie on to the linkage part for the paddle, this seems the only logical place for it but it does not make sense to me. I am sure it should be anchored else where but there does not seem to be an obvious (other) anchor point. Like you its now to B....y cold to continue, tomorrow will be soon enough. regards "Dave Liquorice" wrote in message ll.net... On Fri, 31 Oct 2008 14:33:27 -0000, S wrote: Anyone got any ideas or how these 2 springs should be located, or if anything else could be causing this. I'd go for the springs being wrong somehow. I'd go out and photograph mine but it's dark, it's cold, and I think I'd have to take a cover off to see the springs... I also have a sneaky suspicion there might be three springs but one could be linkage to the paddle blown by the engine fan that opens the throttle if the revs drop. -- Cheers Dave. |
#13
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engine running fast...Briggs and stratton 35 classic petrol
"S" wrote:
having messed about with it a bit more I am still at a loss as to how to locate the springs... I have a B&S engine with two springs, one of which is much finer than the other. The heavier spring is the linkage between the throttle cable and the choke/main valve, the finer spring doubles up the linkage between the crankcase governor and the butterfly valve which it controls. Its ends just hook into the same holes as the wire link itself. Because there is a good deal of looseness in the wire linkage, the fine spring can act as a damper so that the governing action isn't jerky --just like Gary said! HTH brian mitchell |
#14
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engine running fast...Briggs and stratton 35 classic petrol
"brian mitchell" wrote in message ... "S" wrote: having messed about with it a bit more I am still at a loss as to how to locate the springs... I have a B&S engine with two springs, one of which is much finer than the other. The heavier spring is the linkage between the throttle cable and the choke/main valve, the finer spring doubles up the linkage between the crankcase governor and the butterfly valve which it controls. Its ends just hook into the same holes as the wire link itself. Because there is a good deal of looseness in the wire linkage, the fine spring can act as a damper so that the governing action isn't jerky --just like Gary said! HTH brian mitchell I now have the springs correctly located but engine still running fast. Going to take the cover off and have a look at the complete assembly, everything appears to be free and not sticking so the only thing I can think of is the fan blades on the flywheel are not producing enough` blow` to push the governor which is unlikely or the spring on the linkage is to `tense` and therefore not allowing the governor to be blown back and operating the carb valve. I might try and put the likage on the other way round as this should reduce the tension on the spring, worth a try anyway. |
#15
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engine running fast...Briggs and stratton 35 classic petrol
"S" wrote:
"brian mitchell" wrote in message ... "S" wrote: having messed about with it a bit more I am still at a loss as to how to locate the springs... I have a B&S engine with two springs, one of which is much finer than the other. The heavier spring is the linkage between the throttle cable and the choke/main valve, the finer spring doubles up the linkage between the crankcase governor and the butterfly valve which it controls. Its ends just hook into the same holes as the wire link itself. Because there is a good deal of looseness in the wire linkage, the fine spring can act as a damper so that the governing action isn't jerky --just like Gary said! HTH brian mitchell I now have the springs correctly located but engine still running fast. Going to take the cover off and have a look at the complete assembly, everything appears to be free and not sticking so the only thing I can think of is the fan blades on the flywheel are not producing enough` blow` to push the governor which is unlikely or the spring on the linkage is to `tense` and therefore not allowing the governor to be blown back and operating the carb valve. I might try and put the likage on the other way round as this should reduce the tension on the spring, worth a try anyway. Just a speculative thought: on my engine the visible part of the governor consists of a shaft emerging from the crankcase with a lever clamped onto it. The wire link, with spring wound round it, goes from the end of the lever to the butterfly valve on the carb. I imagine the angle of that lever to its shaft is pretty critical so if it got disturbed it while dismantling/re-assembling, that could affect the speed setting. Is there any part of the governor mechanism inside the crankcase that might have become misaligned? |
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