Garage Guy
Well Known Member
O-360-A1A in a RV-6 with about 470 hours, 10-3878 (MA-4-5) carb.
Lately, when shutting down, pulling mixture full back to ICO does not reliably stop the engine... it just makes it idle slow and rough. It's worst doing this with the throttle all the way back; with 1/4" or 1/2" of throttle, ICO does seem to work a bit better but still not great.
This is with the engine warmed to operating temperature. With engine cold (for example I've just started it and idled it for a minute) ICO works fine.
I've pulled the cowls to get a good look at the carb, and the mixture lever is getting full travel, stop to stop. It looks like the mixture control shaft has a bit of play in the carburetor housing.
What do you all think? Get an overhauled carb ($795 from Aircraft Spruce)? Get a rebuild kit ($460) and do it myself? Or is there some known trick to try at this point?...
--Paul
Lately, when shutting down, pulling mixture full back to ICO does not reliably stop the engine... it just makes it idle slow and rough. It's worst doing this with the throttle all the way back; with 1/4" or 1/2" of throttle, ICO does seem to work a bit better but still not great.
This is with the engine warmed to operating temperature. With engine cold (for example I've just started it and idled it for a minute) ICO works fine.
I've pulled the cowls to get a good look at the carb, and the mixture lever is getting full travel, stop to stop. It looks like the mixture control shaft has a bit of play in the carburetor housing.
What do you all think? Get an overhauled carb ($795 from Aircraft Spruce)? Get a rebuild kit ($460) and do it myself? Or is there some known trick to try at this point?...
--Paul