This engine came from a friend with 4 hrs, it has not been use for about 4 to 7 years ( was in a Tamjets A4 ) it is in my Reaction now, before the maiden it was only running up to 149K, then, I reset the throttle PID loop, then all was good for 6 flights, today flight number 5 was good, came back down, did a hot fuel up and went right back out for flight number six, during this flight I noticed a bit of lack of power during a go around then, landed, taxi back, hot fueld up and went right back out for flight number 7, during the TO run I noticed the lack of speed, stopped to TO run and taxi back to the pits I checked the max rpms, I was getting only 90K with a fuel pump voltage of 1.1v at max rpms, I let it run on idle some more, about two minutes later, it quit with a low rpms massage, I try to start it and it didn't, second problem, I think the starter O ring is worn out, I can change that, I got a low rpms massage during the start sequence.

In short, it was running good and now it doesn't go to max rpms, the fuel filter was checked before flight 5.

Any suggestions?