Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

nighteye

Powermax Puff

Recommended Posts

nighteye
I got done mowing the lawn yesterday with a 9020 (Onan CCKB) and when I moved the throttle lever rapidly from full to Idle, it let out a puff of blue smoke.? No smoke before or after the decelleration. I ran it for another 10 minutes on another piece of lawn and tried it again and got the same result. Its never done it before and I am concerned for her health. Can anyone help me out on this? Its got 820 or so hours on the motor and runs real good. Thanks, Ken

Share this post


Link to post
Share on other sites
patrician12
When you quickly close the throttle on an engine the manifold vacuum skyrockets from 15 to 25 inches.You are either washing the rings with gas from a worn carburetor or scavenging oil out of the crankcase breather tube.It's really a better idea to throttle down gradually anyway.

Share this post


Link to post
Share on other sites
CarlH
Might also be worn valve guides/stems or seals.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.

×