1974 70 horse johnson lower unit

[redscolt]

The lower unit on my 1974 johnson 70 horse has water in it .What seal should I change to fix this problem

 

[Monte1961]

Re: 1974 70 horse johnson lower unit

Pull the prop first and see if theres fishing line wraped around the shaft first. But if theres away you can pressurize the l/u in water or soap bubbles, that would tell you! You will only need 12lbs psi to do it! But no more than that!

 

[redscolt]

Re: 1974 70 horse johnson lower unit

how can i do that at home

 

[redscolt]

Re: 1974 70 horse johnson lower unit

Took the prop off and notice oil in the shaft . could this be my problem?

 

[1946Zephyr]

Re: 1974 70 horse johnson lower unit

It's prabably time to re-seal the lower unit. This motor is only 37 years old now and seals will start going bad one by one, until all are replaced.

 

[Sixmark]

Re: 1974 70 horse johnson lower unit

Don't forget to get the seals for the drain/fill and vent plugs as well, alot of people overlook them.

Damn it's hard to imagine that my 75hp is already 27 years old/young.

 

[1946Zephyr]

Re: 1974 70 horse johnson lower unit

Ahhhh, don't feel bad. I have a 35, that is 52 years old now and all my other motors go up to 70 years old.