Water in lower unit 1973 85 hp

[amarcil77]

First I want to thank everyone for the advice on getting my motor running.

I have owned the boat and motor since October.
1973 85 hp 85esl73m

Now for the current issue. I changed the lower unit oil 2 weeks ago. I put the boat in the water yesterday and it ran great, brought it home and flushed my engine. I was in the driveway today and noticed a quarter sized oil leak on my driveway. After looking at the lower unit I found my leak. It's leaking at one of the lower unit mounting bolts and I have water in the oil again.

I'm going to pull the unit and replace the water pump impeller. What else should I look at so I can resolve this issue. I'm also wondering if I should just do a whole rebuild on the lower unit.

 

[boobie]

Re: Water in lower unit 1973 85 hp

After you get the lower unit off, have it pressure and vacuum checked. That will take the guess work out of where it's leaking.

 

[Bosunsmate]

Re: Water in lower unit 1973 85 hp

I dont have access to pressure testing so i normally do the shift and drive shaft seals and retest, if thats ok great, if not i get stuck into the prop ones.
If i didnt deteste the local marine shop i would probably pay for the mentioned pressure vacuum test first

 

[iwombat]

Re: Water in lower unit 1973 85 hp

You sure it's gearcase oil and not just unburned two-stroke mix?

http://forums.iboats.com/engine-fre...leaking-around-lower-unit-iwombat-207285.html


Edit: Oops, nevermind. Just read that you found water in the oil. Did you replace the fill/drain seals?

 

[emdsapmgr]

Re: Water in lower unit 1973 85 hp

While you are doing a few of the lower unit seals, why not do the others? These can also leak: upper driveshaft seal, orings around the 4 carrier bolts, and the large carrier oring itself.