Overheating of the shaft, 15HP Evinrude

Berent

Recruit
Joined
May 31, 2005
Messages
2
Hi<br />I have an older 15hp outboard engine (Evinrude make, probably around 1980) where the shaft between the engine and the propeller are getting baking hot when running. The “tell tale” water stream is present and also as strong as ever and the temperature on the water coming out from the “tell tale” is also OK.<br /><br />Another symptom of the problem is that there is coming white smoke (it could also be steam) out from the exhaust when running the engine at low revs. Anyone that have an idea what the problem could be ??? <br /><br />I appreciate all good answers.
 

Chinewalker

Fleet Admiral
Joined
Aug 19, 2001
Messages
8,902
Re: Overheating of the shaft, 15HP Evinrude

Hi Berent,<br /> It's quite possible that your motor's exhaust tuner has corroded or broken allowing exhaust to enter the mid-section. Normally the exhaust is routed out through the prop, with only a small relief hole in the exhaust tube to allow low idle when the lower unit is fully submerged. Easiest way to check this is to drop the lower unit and take a look. You should be able to see most of the exhaust tube if you shine a penlight up into the midsection...<br /><br />- Scott
 
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