Any Old Timers out there?
I have one a couple of those old Stunt .40 Fox engines that I dug out of the attic to use. After a careful break in I am using one in a Magician with an 11-5 wooden prop. ST nva, RC Long plug, and10% fuel with 28% castor oil.
The 4-2 break is not crisp and clean but seems to be slow breaking into one or the other. I have been told that an extra head gasket is the answer. The engine is a dream to start and needle but so far, the perfect 4-2 break alludes me. I have been informed that this engine was designed for Stunt by George Aldridge so the timing must be correct. Perhaps a profile is not a good place to search for that good Stunt break.
Any suggestions?
Tia,
Frank