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Old 07-28-2011, 12:16 AM
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Default What exactly causes engine to jerk while idling?



Go to 20 seconds into the video and you'll know what I'm talking about. What causes this exactly and how can I fix it?

The engine is a Briggs 900 series 205cc.


Thank you in advance!
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Old 07-28-2011, 07:10 AM
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It sounds like your idle air mixture is off a little and missing and your governor is hunting trying to keep it running. Try adjusting your idle air and tdle speed it should smooth out.
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Old 07-28-2011, 10:41 PM
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Get a smaller driver (less teeth) or a larger driven (more teeth).
Fun factor will increase significantly....and clutch will run cooler.
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Old 07-28-2011, 11:43 PM
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Quote:
Originally Posted by Russ2251 View Post
Get a smaller driver (less teeth) or a larger driven (more teeth).
Fun factor will increase significantly....and clutch will run cooler.
Already taken care of. Got a 60 tooth drive sprocket coming in the mail tomorrow! The engine has a 10 tooth 40# Chain clutch, so I won't be getting much smaller there. 6:1 drive ratio should give me plenty of torque.

Along the sprocket, everything else to rebuild the rear axle assembly comes in tomorrow. If you haven't read on the build thread, the axle you see in the video is trashed. pothole+speed=bent axle. Not bent a lot but bent enough to make for very horrible vibration at 30+ MPH.

No worries though, everything I need to get it up and running again is coming in tomorrow.


And thanks for the response, Cyborg. I'll look into it tomorrow.
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