200 yamaha 1999 overheat alarm

[youick]

Alarm only goes off when idling but is fine running wide open. is my water pump not working properly. If so where is it located and where would this sensor be at.

 

[rodbolt]

Re: 200 yamaha 1999 overheat alarm

water pump, Thermostats and Pressure control valve maint is annual or every 200 hours WHICHEVER OCCURS FIRST.
just like the maint schedule says.
which hasnt been done on your rig lately?
your describing a typical pressure control valve grommet issue.

 

[youick]

Re: 200 yamaha 1999 overheat alarm

Where can I locate the pressure control valve grommet. thanks

 

[youick]

Re: 200 yamaha 1999 overheat alarm

Where can I locate the pressure control valve grommet. thanks

 

[zzzzz]

Re: 200 yamaha 1999 overheat alarm

you can pull up parts diagrams at yamaha-motor.com...go to the marine section - then parts and service to view the parts catalogs

 

[zzzzz]

Re: 200 yamaha 1999 overheat alarm

go to the 3rd "cylinder/crank" picture and you'll see it on the back of the motor on the outer exhaust cover