posted 08-22-2003 09:41 PM ET (US)        

Noted the buzzing sound shortly befor reaching destination. Had good water flow out the teltale, oil tank was filled that morning and still had a good level. the buzzer sounded only when shifted into gear F or R not when in neutral. Don't have a temp guage on board, engine felt warm to touch but not hot. when we left destination two hours later problem was resolved. no more buzzing. RPM limiter did not engage, as was noted in manual for overheat situation or low oil level for injection system. I am turning a 17 pitch elephant ear aluminum prop, motor is rated 5250 -5650 max RPM. Was running at @5400 RPM trimmed flat when noise started.