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50 HP MERCURY overheating

My 2002 Mercury 50 HP motor sat in the water 30 days Sept till now.  Turned the key and noticed more smoke than usual and it didnt clear up during idle.  Saw the recirculating pee water just gurgling and not flowing. 

The intake for water was clear, however, appeared to be blowing water slowly out, instead of sucking in.  Oil appeared on the water surface, spreading out in a circular manner from the boat. White smoke didnt stop.  Ran for about 4 minutes.

Motor was never raised out of water for 30 days.  Did something grow inside it??

Help,

Steve

 


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495 helpful answers

Life is a one lap race. Make many pitstops.

Your water pump needs replaceing. Don't run the motor until you do.

Posted 2009-10-30T17:25:08Z
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If you have a temp gun, take the cowling off and check the temp of the head or where the thermostat is. If you dont have a temp gun touch it, if you can hold your fingers on it for about 7 seconds it's fine. The overheat temperature should be around 160 degrees F and normal operating temp should be around 130 degres F. If its not cooling then you should replace the water pump. The excess smoke could be from the oil injection since it has been sitting. try blowing some compressed air through the pee line.

Posted 2009-12-17T18:48:34Z
magnumrapala was invited by Yedda to answer this question.

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