2000 Mercury XR6 150 Overheating

The temperature warning horn on my xr6 has started going off under load.  Usually pulling with skiers, I am able to run about 3 or 4 minutes and the warning horn sounds.  I am getting a solid water stream out of my engine, so it does not seem to be the impeller.  Any other ideas on what may cause this?

Thanks for the help




Change the water pump assembly first. All the components, not just the impeller. We have had some engines this year with the same problem and the exhaust plate gaskets have failed allowing exhaust air to enter the cooling water. Check this if the problem remains after the pump.




Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Mark C.


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