Yamaha 2001 OX66 SS - Overheating

I have had this outboard for 2 years with no trouble. It has 90 hours on it.<br /><br />Due to lifes complications it was neglected for about the last 9 months. It sat at my fathers house with no love. Prior to this I had taken it out and ran it for several hours with no problem.<br /><br />Last weekend my father decided to fire it up for me and run it a few minutes. He thought the front mounted flushing hose could be used to run the outboard. He ran it for about 10 minutes before the heat alarm went off. I came out and hooked ears to the foot with the same results.<br /><br />I have heard that this can ruin the impeller so I dropped the foot and replaced the impeller. No change. <br /><br />I am looking for any advice and direction. This outboard has never had any heating problems.

Re: Yamaha 2001 OX66 SS - Overheating

remove and clean the pocket for the pressure relief valve. replace the valve grommet. do you have any tell tale at all ?<br />was the pump housing melted at all? even a little bit ?

Re: Yamaha 2001 OX66 SS - Overheating

It's the Poppit valve, or possibly, the single feed water muffs. Sometimes they don't supply enough feed water.

Re: Yamaha 2001 OX66 SS - Overheating

Originally posted by rodbolt:<br />do you have any tell tale at all ?<br />was the pump housing melted at all? even a little bit ?

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Yes I did have tell tale, though it was weaker than normal. There was no melting at all. <br /><br />I will check the areas you mentioned, thanks.

Re: Yamaha 2001 OX66 SS - Overheating

Originally posted by John from Madison CT:<br /> It's the Poppit valve, or possibly, the single feed water muffs. Sometimes they don't supply enough feed water.

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I will check the poppit valve. I am suspect of it being my muffs as I have never had any problem with them in the past on this outboard.