1978 55HP Johnson, Milky oil in lower unit

[ptjones]

Hi, I am looking at buying a particular 1978 55HP Johnson Seahorse outboard. The engine runs well and has compression of 120/120 psi in both cylinders, cools well, but the oil in the lower unit is somewhat milky. I didn?t see any cracks or damage to the lower unit so I am not sure where the water is getting into the case. I think the seal might be the culprit but I am not sure. Dose anyone have any idea where or how the water could be getting in?

 

[F_R]

Re: 1978 55HP Johnson, Milky oil in lower unit

You are wise to be concerned. Water can mess it up pretty bad. Can you get a test run before you buy?

Drive shaft seal, propeller shaft seal, drain & fill plugs, shift rod seal. Why don't you just change the oil (use ONLY OMC/BRP Premium Blend oil) and check it again after a few outings? You don't know how long it took to accumulate that water.

OR, if you plan to do a new water pump, that is a great time to change the drive shaft seal.

 

[sabian]

Re: 1978 55HP Johnson, Milky oil in lower unit

hey i got a 40 hp and i lost all momentum, water came out of drain hole so i took off lower unit. it looks good and clean but what the hell? I need help! soon.

 

[Vic.S]

Re: 1978 55HP Johnson, Milky oil in lower unit

Sabian,

Got a question start a new thread of your own.

Got water in your gearcase you have defective seals. Requires urgent attention.