Originally Posted by
qazimoto
If that fuel works ok in your other PAWS then it's fine in this engine.
Those props are quite a way towards being an excessive load for my tastes. I use a Master 11" x 5" on my similar PAW 35 in a Ringmaster.
Can you trim your APS 13x6 down to say a 10.75" diameter?
Other than that I can't see too much wrong. Carbon on the piston might take a few 100's RPM off the top end of the range, but I don't think that it's your problem.
I have [h=3]Master Airscrew 10 x 8 Wood Propeller[/h][h=3]Master Airscrew 7 x 6 Propeller[/h]I will try 10 x 8 and post a video. 7 x 6 is too small I think. or I will buy 11" x 5" tomorrow.
when I sock the engine in diesel for release it to turn free I found considerable carbon particles in diesel. anyway first I try the prop then de carbonize the engine. It is definitely sputtering in run. the crank end play also to be minimize by washer.