1984 Yamaha 175 V6 question

[CalvinBr]

Good day to all. This is my first time here. I just got my yamaha 175 V6 back from a 3 carb overhaul. I took it out yesterday and it got my 20' Grady White on top like a new motor. About 2000 yards from where I got on top water it lost power. An alarm came on and I lost power down to an idle. What I have fresh gas and oil tank was and is full. After making sure the oil tank under the cowling was full and the gas was flowing good I started it up and had no alarm. I took off and got on top again and ran for about 5 min then the same thing.

Thank you for your time.
Calvin
South East Texas

[boscoe99]

There are two events that will put the motor into RPM reduction mode and sound the alarm. Low oil in the main tank (or a faulty sensor or wiring) and an over temperature event.

Given what you describe I would suspect an over temperature problem. How are the thermostats and the water pump?

[CalvinBr]

I have not checked the thermostats yet. The motor was pumping water from the straw good. It is a 1985 motor

[TownsendsFJR1300]

I have not checked the thermostats yet. The motor was pumping water from the straw good. It is a 1985 motor

Please read this thread, post #2: http://www.yamahaoutboardparts.com/f...d-th21995.html

This engine too was pissing plenty of water but the water jackets/heads were badly clogged with salt apparently causing the overheating/shut down...