Back to the rough running
Couple of things that I have really noticed down here with the E10 fuel, it does go off (stale, water logged, what ever) very quickly. The best cure I've found is an electric fuel pump. Both big trucks have electric fuel pumps and letting them prime the carb before trying to spin the engine makes all the difference. They don't seem to care if they have sat for a day or a month both of them also are reasonably fresh rebuilds. My HUP is a different story it still has only a mechanical fuel pump and if it is started every week regardless of temperature it starts fine, evens out and runs smooth quickly. If it sits for a month then it doesn't want to start and when it does it takes a long time to smooth out. I suspect that it is the all the stale gas being pulled out of the carb.
Another suspect for the rough running is the vacuum advance, is it working?
Cheers Phil
|