Originally Posted by
offr0aden
I run a D21E - break in was tough as these motors are really tight. I run a JP-3 pipe on mine and really enjoying it. What model are you running, what are your needle settings, and are you running a turbo plug or standard plug (With the brass washer)? How many gallons, what temps, does it run fine and then die or blow the plug. I'm sure we can help, just need more information.
IMHO - these are great engines.
I run a turbo plug try to keep it around 200 to 215 and only has a gallon on it. It will run fine for a while and just blow the plug.