OK …..several weeks ago when I developed higher RPMs at idle this was potentially caused by a new vacuum leak. Spraying carb cleaner on said leak will increase RPMs further because your adding fuel?
Now I’m confused. I have not had time to investigate this further until tonight. Bought another can of carb cleaner. Fired up the 40 and let her warm up. Began checking everything with more carb cleaner.
Seems to me there were times when I sprayed carb cleaner on certain areas that the idle...
Was able to get a bit of garage time today. Found a spot using carb cleaner somewhere under the intake manifold, radiator side. Vacuum gauge went up 1 to 1.5 cm Hg and RPMs dropped. Definitely a leak there. Buttoned everything back up. Adjusted carb, still Idling about 900-950ms with a...
Ok..hope to have some time weekend of 12/11, 12/12 to get some garage time.
Anything else I can do to be 100% sure there is no Intake manifold leak before I pull the carb to inspect ?
@cbmontgo I started from scratch adjusting the carb….got summoned to the table for Thanksgiving dinner right in the middle. Now I have to watch the Egg Bowl. Good luck to your Rebels. Busy tomorrow so I hope to get back into it Saturday morning.
Air cleaner housing off. I have sprayed almost an entire can of carb cleaner around the entire intake manifold, base of carb and carb itself. I am getting nothing. No decrease in RPM anywhere. I have checked the choke linkage 4 times. Unless I am missing something ( which is entirely...
@bhsdriller Its running great.…cant really notice any difference there. Still pulling 15-16 on the vacuum gauge which is right where it was after my last valves/ carb/ timing adjustment.
@cbmontgo …linkage is good. Timing gun showed 1400 RPMs. Carb cleaner under the carb heat shield yielded an drop in RPM. Now to find time to get the air cleaner off for a closer look. Looking like it could be an intake manifold leak. This engine was rebuilt/refreshed about 12 years/30000...
My 40 started idleing high yesterday. This was after a cold start. Pushed the choke in and it didn’t return to the normal 750-800rpms. I haven’t been able to put the timing gun on it to see how high the RPMs are. I’m guessing 1250ish. I checked the choke mechanism to make sure it wasn’t...