jeffro Posted August 23, 2011 Report Share Posted August 23, 2011 Friend of mine has a 1985 Mariner 30 attached to a small fishing boat. The engine ran great up until about 2 months ago when it would slowly overheat and kill the engine after about 4 minutes of running it. Pulled the bottom of it off to find a fucked up impeller, so replaced that and took it out for a test yesterday. Ran fine for about 4 minutes then slowly stalled out, smoking a little bit. It wouldnt restart, but would crank over fine. Now, what could possibly be causing this thing to overheat like that? He believes he didnt mix the gas right, but could that have that big of an impact? Quote Link to comment Share on other sites More sharing options...
99FLHRCI Posted August 23, 2011 Report Share Posted August 23, 2011 If it has to little oil in the gas, it has to little lubricant. It would be like running your car with little to no oil. Excessive friction causes heat. Quote Link to comment Share on other sites More sharing options...
Tindall2006 Posted November 15, 2011 Report Share Posted November 15, 2011 Do a compression test, also look for pieces of the impeller stuck inside of the engine. I suggest blowing compressed air in the Pee hold (i don't think this engine has one though) to blow any peices of impeller out with the lower unit removed. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.