Yamaha OX66 overheat warning

Gary47 · Jul 8, 2018

iBoat friends . . .when I troll slowly with my single OX66 (SX250TXRZ, 2001) after about ten minutes the overheat warning alarm will sound and the gauge icon will blink(same as the oil warning.) If I accelerate for about 30 seconds, it goes away. The engine is very clean and there is a strong stream out of the "P" hole. Thoughts? Thanks in advance.

99yam40 · Jul 8, 2018

are you saying the oil and over temp icons are coming on when the buzzer sounds?

Gary47 · Jul 8, 2018

Yes, but it appears on this model the two malfunctions use the same warning system---alarm and blinking icon. The oil system was not the problem, as this scenario has presented itself a few times before. I hope I am not hurting the motor by getting back underway until the alarm stops. And by underway, I mean increasing speed from a troll to maybe 2000 RPM. After 30 seconds, the alarm stops and the icon ceases to blink, and the motor runs at full gallop (5500 RPM & 40 mph.) This is a 25' walk-around...