Alarm sounds while *****ing

[Pops]

I have a 1998 C60TLRW 60 hp 2 cycle Yamaha.
I can run at regular speeds all day with no alarm.
However, If I ***** at just above idle for 15 min or so the alarm sounds.

Is this a impeller or temp sensor problem?

Best regards,

Pops

dw2go@yahoo.com

[steges101]

have you checked your thermostat

[mitch]

water pressure valve dumping water at low revs

[99yam40]

I agree, sounds like PRV stuck open and dumping water and not allowing the block to fill all the way up at low RPM

[Pops]

How to check PRV & thermostat?

I agree, sounds like PRV stuck open and dumping water and not allowing the block to fill all the way up at low RPM

Thanks guys,
How do I check the PRV and the thermostat to see if either is defective?

I appreciate your time.

Pops

[Richard D]

1998 yamaha overheating

I have the same problem with the exact same motor. I hope someone knows where to find the PRV on this motor. I cannot find any reference to a PRV in parts list.
****

[boats.net]

The C60 doesn't use a pressure control valve, start with replacing water pump probably will solve problem.