RE: OS Max 60 FP Not Running
It could this simple
what fuel are you using ?
A FP engine is a plain bearing engine, they run best on castor oil based fuel about 5%nitro
The other thing to try is cut a 1/4 inch of fuel tube and put it over the theaded part of the high speed needle, put the needle back on.
This will stop any air leaks.
Johnkpap