What was found
WHILE TROUBLESHOOTING INTERMITTENT LOSS OF POWER, FOUND BAFFLE INSIDE OF TAILPIPE HAD BROKEN LOOSE AND WEDGED NEAR OUTLET OF TAILPIPE. THIS CAUSED AN INCREASE I N BACK PRESSURE WHICH CAUSED THE ENGINE TO NOT DEVELOP RATED POWER. SUBMITTER SUSPECTS CAUSE, HIGH TOTAL TIME, VIBRATION, HEAT.