engine help
 

I bought a used plane and the engine has been broken in.I am trying to get it set correctly...I can get it started and running smoothly...gooseing the throttle...no problem....but i am getting alot of fuel out of exaust...is this normal or am i set way too rich...?

RE: engine help
 

run it wide open and then turn the high end needle in (lean) as you hear the rpms drop a little,, turn it back out a quarter turn and your set. if it transitions good,, then your low end good.

RE: engine help
 

there should be no fuel in the exhaust.if your rich there will be smoke and maybe fuel spitting out of the carb.but the fuel should be burned.could it be oil?are you using muffler pressure?any fuel getting sucked into the muffler thru the pressure fitting?

RE: engine help
 

I don't kno what you mean by " are you using muffler pressure?" I assumed an engine running too rich would spit fuel from exaust....not alot....just drips....I am using after run oil.....

RE: engine help
 

is the drip actual glow fuel or the non burning oil that is in all glow fuels. glow fuel planes are known as slimers for a reason. If your exhaust was completely dry you would have a serious problem

RE: engine help
 

If the engine is rich enough, it will spit out unburned fuel as well as oil, espeically when you first get it started.

It's also possible that you are getting fuel in to the muffler, either during fueling (by not taking the vent line off the muffler), or when starting (most common with a side-mounted engine, but possible with some muffers on upright mouts).

As suggested above, run the engine up to full power, then slowly lean it out. The RPM should go up and the exhaust will change.

Oh, and finally, I assume the fuel is actually coming from inside the muffler? I've seen a pinhole in a fuel line squirt fuel out so that it winds up running down the outside of the muffler and into the exhaust because of the prop blast. At first glance it looked like it was coming out of the engine, but it was really all external.

RE: engine help
 

Yes .....I had fuel in exaust because I failed to remove vent hose when fueling....think I have it running properly now...Thanks