hot motor

[jim harbor]

I have a 2010 200hp HPDI that runs 5800 rpm at 8lbs of water pressure. We have had it checked by the Yamaha techsand changed guage, water pump and cleaned a valve at the back of the motor. the techs say the motor has never run hot and no alarms have gone off.

We have repoisition the motor several time with no effect.

WHAT SHOULD I DO NEXT

[mitch]

What is the water pressure supposed to be ? it may not be a problem consider a car , a radiator runs at about 13 lbs with a cap closed system and that is to raise the boiling point .

You do not get cooling from pressure but from the VOLUME of water that is flowing, removing the heat

[99yam40]

I have a 2010 200hp HPDI that runs 5800 rpm at 8lbs of water pressure. We have had it checked by the Yamaha techsand changed guage, water pump and cleaned a valve at the back of the motor. the techs say the motor has never run hot and no alarms have gone off.

We have repoisition the motor several time with no effect.

WHAT SHOULD I DO NEXT

did it ever run higher PSI?