Sorry if this is slightly off-topic, or not quite the right group for thi, but if any of you have knowledge of these engines I would be grateful for some help. The engine is a 3.5HP one about 25 years old. It runs reasonably well until you increase the revs and then the flywheel key (the square bit that turns the engine for starting - I don't know what else to call it) seems to engage and drives the starting coil, which makes a terrible screeching sound and threatens to wreck the mechanism, we have to shut it down at this point. Anyone got any ideas what the problem might be?
Briggs and Stratton engine
Apr 12, 2005
2 Replies
sounds like a broken spring in the recoil mechanism allowing it to engage when the revs rise, but i may be wrong, if i am someone will jump all over me and put us both right :)
Sounds pretty plausible to me - and, even if it's not the problem, I appreciate you trying to help. Many thanks.
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