RCU Forums - 63FZS

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I have had some trouble after receiving my engine from you guys a few months ago. Dirt in the regulator was the problem. The guy tested it and ran great. After a few flights and retuning slightly, trouble. Compression is way off now. It has two points of compression now. Very weak also. I can turn with one finger through both points of compression without kickover and worrying about damage to my finger :( not good. Did i get it too lean? Also while adjusting it intially(here at sea level), it kicked back and stopped. Two separate times. Too lean? I put it on a shelf a while back.

MA 13/5 prop
30% heli fuel

Had it tached up to 11,600. In a hover or on the bench it dies off after several seconds and looses power.

Is it toast?? Please help.

p.s. My 110FZ is pulling my Mustang like a turbine. Runs like a top.

Almost impossible to say without seeing it, sorry. Have you reset the valve clearance?
It needs to be at .003" on both valves.

I will adjust and check it out this weekend. I didn't think it would be off since just receiving it from Richard.

Might be a tad tight, which is worse than a little loose. They miss at service sometimes.