I need help. I have a 2003 90 two stroke that overheats on plane. Yesterday I dropped it in the water and idled about 20 minutes through the back channel. Water was pumping great and no problems. Opened up to plane in the bay and immediately overheated, no water from the tell tale. Back down to idle and still no water pumping. Limped 50 yards to the mooring, steaming and buzzer sounding, shut it down. 5 minutes later I started it up and still not pumping water. 15 minutes later, started and pumping weakly. I figured the impeller was cooked so I pulled it apart and no problems, looks great it there; perfect impeller, housing, gaskets, everything. This is a new pump I put in last season, maybe 1 hour on it. Thermostat works fine as well as the pressure valve. Between this and the no power problems I'm ready to dump this POS. The mechanic went all through it last year and couldn't find anything wrong. Any ideas out there before I give up and sell this thing?
Thanks!
Thanks!