Originally Posted by emessys

Prop balance has been checked.

I was hoping someone on the forum has direct experience with this engine in conjunction with a somewhat equivalent size/weight Bipe. Research has told me that the 5.8 is known as a "shaker".

My next step, now that all has been fixed and tightened, will be to wait for good weather, put the whole plane together (it takes quite a while to do) and re-run the engine and see if the situation has improved. Possibly experiment a bit with the timing (advance it a bit more).

If the situation hasn't improved, I guess the cleaned/repaired and improved plane, sadly, will be returned to my buddy.

Ira