over heating

M

medic904

Recruit
Joined
Aug 5, 2003
Messages
1
i have a 78 Johnson 135hp. It just started overheating. I checked the water coming out of the heads and its flowing good. Note, This motor doesn't have the **** hole, the water flows back down the lower unit and comes out just above the intake for the water pump. Need help.
 
OBJ

OBJ

Supreme Mariner
Joined
Dec 27, 2002
Messages
10,161
Re: over heating

Hey T.....<br /><br />78 Johnny 135 and I bet a dollar ya' don't know when the impeller was changed out the last time. It's OK.<br /><br />Good thing to do with a engine that's up there in years is to replace the impeller and and t-stats. Usually, the impeller gets old and loses it's memory and the rubber fins don't know to slide aginst the impeller cup. <br /><br />A good shake down as the Marine Doctor suggested won't hurt a bit. Do compression and spark checks and know what the old shaker is doin'.<br /><br />And by all means.....if your serious about keepin' the old girl...get a service manual. Loads a' stuff in there. Worth the price of admission.
 
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