Yes. As he said.

You can "overload" an engine and merely have it sag, but not overheat if it is properly tuned, but not quite prop'd properly.


On a different plane we found my GMS .76 had it's head temp rising to 400 degrees!!! I was fighting to get it in tune.

I remembered that someone here posted that the head temps should be around 290 degrees F.

I richened the engine out to the point that the temp dropped to about that, and my troubles were gone.

It still seemed a bit rich to me on the ground, but this proved perfect in the air.


I was running a large prop too...