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Overheat problem on 7.5 Merc

Discussion Forum at MarineEngine.com » Mercury Mariner Outboard » Archive through August 14, 2009 » Overheat problem on 7.5 Merc « Previous Next »

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keith rivard
New member
Username: leaseman

Post Number: 3
Registered: 06-2009
Posted on Tuesday, August 11, 2009 - 10:12 am:   Edit Post Delete Post View Post/Check IP

Shaft got so hot it was boiling the water,water was still coming out pisser.Is it impellar problem or something else?
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Graham Lamb
Senior Member
Username: galamb

Post Number: 5828
Registered: 05-2007


Posted on Tuesday, August 11, 2009 - 10:22 am:   Edit Post Delete Post View Post/Check IP

Impeller is the place to start, but could also be a waterpump base or cover seal, water tube seal (at either end), clog on the intake, clog in the water tube, clog in the water jackets.

Maybe start with a waterpump "kit" instead of just an impeller and see what that does for you...
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keith rivard
Member
Username: leaseman

Post Number: 4
Registered: 06-2009
Posted on Tuesday, August 11, 2009 - 10:43 am:   Edit Post Delete Post View Post/Check IP

Thanks Graham will check out this evening

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