89' Yamaha V6 Excel XF Overheating

[Shaffer_R357]

I have a 89’ Yamaha V6 EXCEL XF that over heats. To date I have replaced the water pump and thermostats. The motor over heats when running at anything over 3300 RPMs. I installed a Yamaha water pressure gage to assist in the trouble shooting. The following is a list of the pressure readings:<br />Idle – 0 <br />First reading….<br />3000 – 10 and drops to about 5<br />3300 – 5 <br />3500 – 5<br />3800 – 3 and slowly drops to 0<br />3900 – Heat Alarm<br /><br />I am new to boating, and this is a new boat for me. I would appreciate any help.<br /><br />Thanks

 

[302w]

Re: 89' Yamaha V6 Excel XF Overheating

check the oil tank to make sure your buring oil with a marker.