Location: Freehold NJ
Joined: Aug 6, 2003
Points: 1092
Briggs RPM Runaway Problem on Snow Chick Original Message Jul 29, 2005 1:36 am
I have a Briggs Stratton carb issue that has me stumped...
I picked up (for free) a 1960's Snow Chick (a baby brother to the Yard-Man Snow Bird) mini 2 stage snowblower with a Briggs Stratton engine model 80302 (3 hp). I cleaned out the carb & got the engine running, but the RPMS went to the Stratosphere! The governor arm moves the throttle to the full opening position when the engine is off, and arm appears to move (to lower the throttle) as the RPMs increase, but this has no effect on the engine speed - it just revs up to a catastrophic level. I have everything hooked up properly ("S" link & spring). I wonder if I set the idle & high speed needles correctly - 1 turn on the idle, 1.5 turns on the high speed? When I move the throttle down manually, I get a good low speed level but the engine speed is erratic & the exhaust smells rich. The carb is not flooding. No vacuum leaks. Any ideas?
Location: Freehold NJ
Joined: Aug 6, 2003
Points: 1092
Re: Briggs RPM Runaway Problem on Snow Chick Reply #3 Jul 29, 2005 8:23 pm
AJ & Fred - this is sounding like a little further disassembly is in order. The Briggs website shows this engine possibly having 2 types of governors. Who knows whats inside this thing. I'll try to get some pics up tomorrow.
Location: Freehold NJ
Joined: Aug 6, 2003
Points: 1092
Re: Briggs RPM Runaway Problem on Snow Chick Reply #4 Jul 30, 2005 10:40 am
SUCCESS!!! I pulled the flywheel shroud & found a large nest surrounding the ignition coil and the governor's air vane! The residents even feasted on the spark plug wire! I cleaned it all out, wrapped up the coil wire with electrical tape, reassembled everything & she idles down now. After some high & low speed needle adjustments, this little guy can purr (SMOOTHLY about 500rpm) or scream at around 4000 RPM.
Hi,