Jim....

....the Tower engines come with outstanding instructions for break-in. I would
start with a 10-6 prop, and a fuel containing castor. I add some extra castor
to a fresh can of fuel when I am running-in a new engine....the engines love it.

Just start it up....1/4 throttle....let it warm up for about 45 seconds. Go to full
throttle, then close the main needle until the engine peaks out at full RPM. Don't
worry....it won't hurt it. Then open the needle until you hear the engine slow down
....if you have a tach...slow it down about 6-700 RPM's with richness.

Follow the instructions and you will have a sweet engine. Just don't baby-it, or
lean it out and get it too hot.

FBD.