I have a RV-9A with a Lycoming O-320 carberated. When I cut the mixture, the fuel does not shut-off all the way, and the engine stumbles on at 200-400 rpm.
I have checked the control cable, and it is getting all the way to shutoff. I have disassembled the carburetor and and cleaned up the cut off valve rod inside the carburetor (this cured the problem on a C-172 I owned with the same symptom).
I have adjusted the idle mixture control with no affect.
The problem became worse when I installed a P-mag (I am sure that is because the P-Mag is better and igniting the mixture of fuel remaining..I still like the P-mag.)
I was thinking of trying a rebuilt carburetor. Marvel Schebuler MA4SPA.
Any suggestions would be appreciated. Has someone had a similar problem?
Thanks,
Tom
Dues paid.
I have checked the control cable, and it is getting all the way to shutoff. I have disassembled the carburetor and and cleaned up the cut off valve rod inside the carburetor (this cured the problem on a C-172 I owned with the same symptom).
I have adjusted the idle mixture control with no affect.
The problem became worse when I installed a P-mag (I am sure that is because the P-Mag is better and igniting the mixture of fuel remaining..I still like the P-mag.)
I was thinking of trying a rebuilt carburetor. Marvel Schebuler MA4SPA.
Any suggestions would be appreciated. Has someone had a similar problem?
Thanks,
Tom
Dues paid.