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Mariner 25hp 2stroke outboard. runs fine when

Mariner 25hp 2stroke outboard. runs fine when idling then after a flat out run for about 5-10 minutes then heats up and cuts out. i think its the impeller but it seems to exspell water fine when running slow. anybody have any ideas?

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Change Water Pump Impeller ,
Remove Thermostat And Check To See If Opening In Boiling WAter Clean Ou Any Sand Weed etc, REfit try Again

Posted on Mar 20, 2013

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With what you said.get the water pump done.A little bit of rubber is cheaper than metal.If the motor has a few years on it,the pump does need to be replaced.If the motor overheated after a few minutes,the pump needs replacing now.Yours sounds like it's on it's way out.A bit of sand etc. can do a fair bit.Hope this helps

Posted on Sep 10, 2009

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