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Suzuki 50 HP outboard motor keep overheating. change impellor but it was in good shap removed the thermostat and had a large amount of water comming out of it. But when I plug the water return hose the *** stream stops the water drains from the head as I can see it once I removed the thermostate and 2 minutes later the overheat alarm sounds. Sometimes it self fixes after a while sometime it does not...The thermostate checks fine new impellor flushed the system and there seems to be no blockage. Same result in the water and with the earmuffs. It just seems like something is rerouting the water but where?

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Sounds like a blown head gasket to me

Posted on Apr 25, 2010

  • kedeaux Oct 22, 2010

    having same trouble on 115hp four stroke...changed water pump, flushed it, replaced themostat...got is pissing good now but still running hot....did you have any luck on fixin yours....please if you know what it was, I'm about to go crazy tryin to figure out, would you post me back

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