RE: Tach. readings OS 120 III Surpass w/pump
Update to my above post. Changed to a Xoar PJA 16x6. RPM is hitting 9,000 (peak) but will fly at 8800. Tthe idle is around 1800. I will have to pull the engine though as it has a leak around the pump. I think it is just the fuel line so I will put some keepers on them. Engine has 5 tanks of fuel run through it. The muffler vibrated loose and came off the end of the flex pipe when I was on the third tank. It gained over 200 rpms and wasn't much louder. I put it back on for now, but it got me thinking....