Re: backfire out of exhaust after warmed up shut down.
I got out and looked at the plugs. they were a good light chocolate brown. I started it up and smelled the exhaust. seemed rich so I worked the idle screw down to 3/4 and let it run for a few minutes. pulled a plug and it was wet and black. I didnt get a chance to drive it today. I have also been told to retard timing before shut down. I will have to wait on doing that until I see if the adjustment made a difference. I will have to check for leaks but I spent some time sealing the exhaust up so I would hope that held.
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