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WHAT WOULD CAUSE THE FLYWHEEL KEY TO BREAK SHEAR OFF?IT HAS HAPPENED TWICE NOW.THE PLASTIC GUARD LOOKS FINE.

CHANGED THE KEY PUT IT BACK TOGETHER AND IT HAPPENED AGAIN.WHAT ELSE SHOULD I LOOK FOR? THERE IS NOTHING IN THE FLYWHEEL AREA THAT WOULD CATCH IT.EVERYTHING LOOKS OK? STUMPED

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Posted on Jan 02, 2017

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SOURCE: I have a briggs and stratton 15.5 ohv, model#

Found that I had left the comprssion washer (flywheel washer) off when I assembled it the first time. Put it on and torqued to spec it runs fine now.

Posted on Jun 07, 2009

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SOURCE: WHAT KEEPS BREAKING THE FLYWHEEL KEY/ CHANGED IT OUT TWICE. DOESN'T SEEM TO BE ANY DEBRIS IN AREA, DOESN'T SEEM TO BE CATCHING ON ANYTHING

Hi Tami:
When you replace the key, the flywheel attachment nut has to be really tight so that there is absolutely no slop in the flywheel connection. Give it another try. Don't strip the threads, but also, don't be afraid to pull on the wrench.

Posted on Apr 26, 2015

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