Originally Posted by Tex

Mich you tempted 287F on your Plus21 after a 30 min main, switching fuels in the middle of the main without retuning, low on fuel at the time (in the gas tank) and the motor is still in break in stages.
OF COURSE IT'S GUNNA RUN THAT HOT!

BTW, even the pros will tell you that 290F isn't bad if you have plenty of smoke and the motor doesn't act lean. Run it where it's happy

You do NOT need a new motor right now.