Hello All,

I have recently posted in the Serpent 720 thread about a similar issue. My motor is beautiful for 2-3minutes then slpowly looses power to the point its like running a blackcan. This happened in both motors I tried(Mention they were both working perfect fro 3weeks then all of a sudden this happened)

I am using the Mega ZX12 Race and Mega MF, both had the same issue after my 3rd qualifier when the issue happened the motor just lost power. I took the motor apart (both) cleaned and everything to inspect but there were no leaks or anything no unusual wear nothing. I then took the tank to a air compressor and blew it into the pressure nipple. turns out almost all of the air was esacping through the cap, I applied a little bit of pressure to the cap, and I mean alittle and voilla it all came out the fuel resevoir.

It may not seem noticable but try it(if you have an air compressor, rember these engines at high RPM are forcing through alot of air. I have read elsewhere people using fuel filters on the pressure line to decrease air pressure and volume going into the tank. I will try this this weekend with a new cap, spring and seal of course. Hopefully this will solve the issue.

Also I have heard wind that using the wrong glow plug will cause this isue, but I dont know about that as I was using a NR 7Cold on a day with medium humidity and about 24-27deg celcius which everyone else was running and both motors experienced the same issue.

It has to be a result of air leakage, anyone else have other thoughts?