flywheel key

Joined
Dec 2, 2012
Messages
30
Location
iowa
i have been chasing a occasional flutter while mowing for quite some time. i have a 190cc 6hp briggs flathead.could a partially sheared flywheel key cause this intermittent miss?mower is 10years old and i have NEVER struck any object while mowing so i dont know why the key could be sheared or partially sheared.i am a fanatic about fresh no ethanol stabilised gas ,clean air filter,etc.if i would visually inspect the key would i be able to see if it is faulty? thank you for any input!
 
Joined
Dec 19, 2004
Messages
7,430
Location
beaver land EH?
over time, flywheel key on B&S flathead will shift, and your timing will be slightly off as a result. When in doubt: always correct the timing first (by replacing the partially sheared flywheel key) and then take it from there. Get a replacement key (get some spares if you want to maintain your B&S longer) and replace it. Q.
 
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