I run a 14-8 on an OS 1.08 FSR, which is a powerful engine.

The thing is, if you over prop an engine, it is like a car that is driven
uphill forever, it will heat up, and never get a chance to cool down,
it's always under a load. Engines that are propped so the engine can
not "rev freely" are destined to give problems....where as a similar
engine that is running cool and free, will give better running results.

Add to the over propped engine...some hot running fuel, a Pitts
style muffler, a cowling.....and have it running up hill all the time....

....you have a recipe for an over heated, and sometimes damaged
engine, as well as dead sticks and crashed airplanes. []

FBD. [sm=teeth_smile.gif]