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#1
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B&S starter mechanism and throttle questions
New poster here and not sure if I'm in the right group for these
questions. If not, maybe someone can point me in the right direction? What causes the "screaming/screeching" of the starter mechanism on an old Briggs and Stratton engine (while engine is running)? The kind that sometimes results in a "backlash" (for lack of a better term) of the starter rope around its pulley. I've seen several mowers do this occasionally but I've never seen FAQ maintenance tips regarding prevention. I suspect the ratchet mechanism is the culprit but upon inspection (spinning it by hand with cowling removed) I've seen nothing wrong with it. I've tried lubricating mine but doesn't seem to help. Also, when removing the starter pulley (to untangle the backlash or replace the spring), the metal retainer tabs will eventually break off. Anybody have a fix for broken tabs, short of buying a new cowling? And while I'm on the engine topic, I've recently been shopping for another small, simple, cheap, push mower. I'm astonished to find the new designs have no throttle on the handle. What's up with that? Sales people I've talked with (Walmart, Kmart, Lowe's, Home Depot, etc) can't answer why a throttle is no longer standard design nor whether or not I can add one myself (kit for extra $$ maybe?). They simply tell me I don't need a throttle, at which point I move one with my search (whether I need one or not, I *want* a throttle). Anybody here ever jury rig a throttle one one of these new throttleless designs? Seems simple enough but I haven't looked closely at it yet. Thanks in advance for any input. Rick |
#2
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B&S starter mechanism and throttle questions
the starter clutch has a wick in them to keep them lubed, when they start to
scream it means they are no longer lubricated / became rusty / have some type of dirt in them. to clean them you want to clean up the shaft part of the crankshaft that goes inside them with a fine emery cloth, you will also have to clean the inside of the clutch where the shaft fits into. lube it up. this does not always work and you are only left with replacing the clutch. as for the tabs on the shroud they come with 4 use only 2 at a time and when 3 have broken off it is replace it or have someone weld tabs back on hope that answers your questions. |
#3
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B&S starter mechanism and throttle questions
What causes the "screaming/screeching" of the starter mechanism on an
old Briggs and Stratton engine (while engine is running)? The kind that sometimes results in a "backlash" (for lack of a better term) of the starter rope around its pulley. I've seen several mowers do this occasionally but I've never seen FAQ maintenance tips regarding prevention. I suspect the ratchet mechanism is the culprit but upon inspection (spinning it by hand with cowling removed) I've seen nothing wrong with it. I've tried lubricating mine but doesn't seem to help. you need to pull the starter clutch off and clean it out, and re lube the crankshaft stub. it's the crank sticking to the inside of the clutch. Also, when removing the starter pulley (to untangle the backlash or replace the spring), the metal retainer tabs will eventually break off. Anybody have a fix for broken tabs, short of buying a new cowling? All briggs motors come with multiple tabs for just such an occasion. Use the extras when the originals break off. Stens corporation make plastic pieses that lock onto the cowling that fix it when you use up all of them. And while I'm on the engine topic, I've recently been shopping for another small, simple, cheap, push mower. I'm astonished to find the new designs have no throttle on the handle. What's up with that? Sales people I've talked with (Walmart, Kmart, Lowe's, Home Depot, etc) can't answer why a throttle is no longer standard design nor whether or not I can add one myself (kit for extra $$ maybe?). They simply tell me I don't need a throttle, at which point I move one with my search (whether I need one or not, I *want* a throttle). Anybody here ever jury rig a throttle one one of these new throttleless designs? Seems simple enough but I haven't looked closely at it yet. lawnmowers are designed to run at full throttle. there is never a good reason to run a mower at anything less!!!!! Chip |
#4
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B&S starter mechanism and throttle questions
On Tue, 25 Mar 2003 22:52:31 GMT, "Dr. Doctor" wrote:
clean up the shaft part of the crankshaft that goes inside them with a fine emery cloth, you will also have to clean the inside of the clutch where the shaft fits into It's been a while since I've had it off, but I don't remember the crankshaft fitting up into it. Seems to me the clutch just screws into the flywheel. I'll take a look later today. Here's a picture of it on this parts list (you have to scroll down a little). Is this the same kind of starter clutch you're describing? http://www.jackssmallengines.com/BS4.cfm you are only left with replacing the clutch. Guess that's what I'll do then. It's just that it seems to spin (ratchet) pretty easily ... I guess not easily enough though shrug. as for the tabs on the shroud they come with 4 use only 2 at a time and when 3 have broken off it is replace it Mine had only 3 to begin with, 2 right next to each other, and it takes 2 (one on each side) to retain the pulley. I've long since broken one of the 2 that are close together, so the next one that goes will cause the problem (and it'll take only one or two more bendings to break it off). Seems like it would've been simple to design a better system. Then again, I guess you get what you pay for. or have someone weld tabs back on Thanks. I'll check into that. hope that answers your questions. Yep. Thanks for the come back. Rick |
#5
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B&S starter mechanism and throttle questions
On 25 Mar 2003 18:45:33 -0800, chip wrote:
What causes the "screaming/screeching" of the starter mechanism lube the crankshaft stub. it's the crank sticking to the inside of the clutch. ok, thanks. I'll have a looksee later today. Anybody have a fix for broken tabs, short of buying a new cowling? Stens corporation make plastic pieses that lock onto the cowling that fix it Great! I figured there must be a simple fix *somewhere*. Thanks :-) whether I need one or not, I *want* a throttle lawnmowers are designed to run at full throttle. there is never a good reason to run a mower at anything less!!!!! That's fine most of the time but when I come across a patch of thin grass and dirt, I might like to slow it down to prevent kicking up a cloud of dust. And especially if there's some gravel imbedded. Slowing down can make the difference between saving my blade while getting the grass cut vs slinging gravel all over the place. Frankly, I use my throttle to slow down for other reasons as well. Thanks for the tab tip ;-) I'll try to find Stens on the web. Rick |
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