1973 Evinrude 65 hp

[Popa Henry]

Picked up a boat with 1973 Evinrude 65 hp motor and got it running. Noted that almost every wire on it the outer casing was melted to the motor. Need some ideas to make sure that it doesn't over heat. How should I check it

 

[jimmbo]

Welcome to iboats.
Does the Paint on the Head look like a little brownish? If so then it got pretty hot. Do a Compression Test. If the pressure are below 120, try a different Gauge. If still low, the engine likely has scored Cylinders/Pistons and would need to be torn down and examined. If the numbers are okay, then proceed as follows...
Drop the lower unit, inspect the Waterpump, and at the minimum, replace the impeller. That engine has an Overheat Horn inside the Control Box. You can verify the Horn and wires by ground the wire that goes to the Temp Sensor that is on the starboard side of the Water Jacket cover near the top of the Cylinder Head. When running use a Temp Gun to check the temp of the Top of the Cylinder Head and Engine Block, if it exceeds 150, then more troubleshooting will be needed

 

[F_R]

Unless it has already been repaired, which I doubt, that motor is in need of a teardown and rebuild. There is no other way.

 

[Popa Henry]

Thanks you all. It has new plugs it looks like they check the thermostat. I'm going to drop the bottom in look at the impeller and do that before I have to tear anything else down I will check the temperature on it this weekend. Thank you all again