140l
 

Dave

I have a 140L that I am having a proplem with. I am running an APC 16x10 prop at about 8500 Rpm. The needle valve is about 2 1/2 turns out and the regulator 1 turn below flush. If the regulator is near flush the transition is much too rich. Usually I can't get it too run rich at the top end even if I about it to 3 turns or more, although the engine will sometimes alternate between really reving up and running slightly rich after running at lower throttle for a while. The main needle valve is very insensitive. It tends to quit in the air If run at about 1/3rd throttle for a few seconds. It idles well but often changes idle speed by the end of the flight.

I changed the regulator plunger,diaphram, gasket - no change.
The tank holds good pressure.
I checked the valve settings.
When warm there is compression, but not great.
I am running S&W 30% low viscosity blend.

RE: 140l
 

It may be an early 140L without a gas ported piston. It certainly sounds like it could be. Pull the head and see if there are notches or holes in the piston crown.

RE: 140l
 

Yes, there are 4 holes.

RE: 140l
 

OK, then it needs to make a trip to service. The address is on the webpage.

RE: 140l
 

Dave seems I have an Early L With the Same Symptoms, I have sent it back. But Still Consumes Twice the Fuel as My Later L. And It has Eaten up another Cam follower. When I sent it back said There was No Problems.

RE: 140l
 

Dave

Sorry to take a while to get back to you.

I will send it in.

Thanks

RE: 140l
 

Bipe 10300, call Richard at service, 775-782-4562.

Good Luck!

RE: 140l
 

I will Call Richard. Hope Good Luck! Does'nt Mean Anything.......LOL