1975 25hp Evinrude

[GatorBabyBourbon]

Ok where to start… I got this motor running so far. I just order a carb rebuild kit and a new fuel pump so that will go in as soon as I get it. It takes a lot of effort to turn over, then it doesn’t like to accelerate too much. It’ll run but not very fast, just a little bit past a knot.
However!
Today I found brown milk oil in the can of water under the motor. I’m not a mechanic but I do figure things out decently well.
I’ve been researching leaks and how to replace seals etc. but any advice would be so welcomed!

 

[racerone]

That leakage may be normal.-----Perhaps caused by it running on 1 cylinder.----Post compression test results.-----Does spark jump a gap of 5/16" or more on both leads ?-----New diaphragm on the fuel pump would be my fix.

 

[GatorBabyBourbon]

I have not yet bought a compression test kit so I will get one and check that! Thank you!!

 

[jimmbo]

A leaking Lower Unit would not be leaking at the top of the 5 inch Extension.
have you done a Sniff Test on the stuff doming out of the Drainage Hole? If the stuff leaking out stinks to High Heaven, it is likely Gear Oil

 

[GatorBabyBourbon]

A leaking Lower Unit would not be leaking at the top of the 5 inch Extension.
have you done a Sniff Test on the stuff doming out of the Drainage Hole? If the stuff leaking out stinks to High Heaven, it is likely Gear Oil

I did not notice any stinkiness but I didn’t really smell it closely. I will tomorrow! If it does stink how would I fix that kind of a gear oil leak?

 

[jimmbo]

Replacement of the Seals, under the Water Pump, and for the Shift Shaft.

 

[F_R]

Probably running on one cylinder. Fuel going through the nonrunning cylinder and draining out of the exhaust where it has been emulsified with water and turned black by carbon.