Water in L/U after re-seal

Cricket Too

Lieutenant Commander
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May 14, 2003
Messages
1,732
Hey, had my L/U re-sealed in April by a reputable OMC/Bomby shop. When I got it back, they had replaced my old style slotted screw head fill and rain plugs with the 4mm allen head plugs....no big deal, I actually like them better.

When I went to fill it up, I opened the drain plug and some parts washer/cleaner came out, so I let it drain for a while and filled it up with run of the mill L/U oil that I had laying around, just to rinse it out fully and drained that out.

Then I filled it with Bomby HPF L/U fluid and used new nylon washers on the fill and drain plugs, and snugged them up with the little allen wrench and used it all season.

I pulled the boat a few days ago and drained the L/U to replace the fluid for the winter, and light green milkshake came out!!!!

Now I had been running it on muffs, in gear, for about 10 minutes, just to churn the oil up a bit so it would drain easier, as it was about 40 degrees outside.

So I guess my question (which I think I already know the answer to) is should HPF or any fluid come out looking the way it went in, or will it always be somewhat different looking? I always thought that it should come out either the same as it went in or slightly darker from heat, but it seems like what I have always gotten out, is milky. Is it at all normal for L/U fluid to have a churned up milky look, or is that a definite sign of water intrusion?

I have already spoken to the shop about it and they are going to pressure test it in the spring. But it is still bothering me. Having the re-seal the L/U was not cheap. I know that I used new nylon washers and had them tightened enough, and not overtightened.

Also I should add that my L/U has been sitting submerged in the water for the last month or so, due to freezing temperatures here and not wanting to have the L/U freeze. But it seems to me a properly sealed L/U shouldn't let any water in under any circumstances.

Thanks.
 

jasper60103

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Sep 18, 2008
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Re: Water in L/U after re-seal

When I went to fill it up, I opened the drain plug and some parts washer/cleaner came out,...

So, the shop didn't put gear oil in?
 

kenmyfam

Supreme Mariner
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14,392
Re: Water in L/U after re-seal

Should not be milky, period.
 

Cricket Too

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Re: Water in L/U after re-seal

No I asked them not to, as I had already purchased the HPF, which I prefer to use, and I didn't want them to fill it with something else.

I know the guy who owns the shop so I told him not to bother.

That's not really an issue though, I filled it with reg oil and the drained it again to clean the rest of that stuff out, so I don't think that has anything to do with it.
 

jasper60103

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Re: Water in L/U after re-seal

my point was the shop didn't pressure test it.
 

Cricket Too

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Re: Water in L/U after re-seal

That's what I figured kenmyfam, I knew when it came out that light green color, it wasn't good. The thing is, is that I have never had an engine in 30 years that the oil hasn't come out looking like that, but I figured I finally would after I got this re-seal done.

What are the chances that it got in through the fill and/or drain plugs? I know that is common, but I used brand new washers and didn't over or under tighten.


Jasper, I got ya, but they would have to pressure test with no oil in it anyway, so I would assume they did, but I guess I shouldn't assume that. Just figure that a good shop would pressure test a re-seal job, especially for the $600 it cost me. If I didn't know the guy who did it, I would be a lot more pissed, but I know the guy didn't scam me, I guess maybe something obviosuly isn't sealed correctly.

What bothers me the most is that I have been running it since April of last year until about a week ago, thinking I had a good sealed up L/U, and good oil in it.....now I find out I have been running it, probably for a while, with some water in the oil.
 

jonesg

Admiral
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Feb 22, 2008
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7,198
Re: Water in L/U after re-seal

Did they rebuild or replace any parts? seems high.

I was quoted $375 for a re-seal on my 150,
$75 for a seal kit and labor.

The oil had come out olive cappucino colored.
On advice I got here...I installed a new drain seal on the screw and that fixed it,

at the end of season it came out like clear honey.
 

Rick.

Captain
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Jul 30, 2006
Messages
3,740
Re: Water in L/U after re-seal

Don't really know what your solution will be but I have had new nylon washers leak before. Replaced them a second time and solved my problem. Rick.
 

Evinrookie

Petty Officer 2nd Class
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Aug 20, 2007
Messages
100
Re: Water in L/U after re-seal

Hey Cricket,
You mentioned the shop replaced your old drain plugs with allen head plugs. This might be a stretch but do the new plugs have a gasket already attached to them? One of my plugs does and If I try to put a nylon washer in too, it doesn't seal tight. Also, I'm not sure what all a LU re-seal job entails at your shop but another place that can let in water is the o-ring at the top of the drive shaft. I was having water intrusion and pulled the LU to find that the drive shaft o-ring was gone. New o-ring and now the lube comes out like it went in. Hope this helps.
 

Cricket Too

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Re: Water in L/U after re-seal

jones...yeah they did replace a couple of things, but minor stuff.

It was 4hrs of labor at $110 an hour, so $440

Then the gear case seal kit was $86

Then I needed a new shift rod cover housing, but they sold me a used one they had around for $14

And they replaced the water intake screens, which was $6.50

So with tax it was $593.


The new allen head plugs, don't have a washer/gasket on them. I guess it is possible that one of them leaked, but I guess I will have to wait for the pressure test to find that out.

I actually had my question about the gear oil answered first hand. My friend dropped the gear oil on his twin 200 Johnsons over this weekend, and the HPF came out looking almost exactly how it went in last Spring, maybe a little darker green, but no milkshake at all. And he had his re-sealed like 3 years ago, and he used the same nylon washers as I did, I mean they actually came out of the same bag.

So who knows. I was just really expecting to see a nice dark green gear oil come out instead of this light green milkshake.


Evinrookie....I would imagine that the driveshaft O-ring would be part of the kit, especially since the water pump sits right on top of that O-ring.
 

Evinrookie

Petty Officer 2nd Class
Joined
Aug 20, 2007
Messages
100
Re: Water in L/U after re-seal

The o-ring I was talking about is near the top of the drive shaft right below the splines. Mine was completely missing when I dropped the LU. Another suggestion someone gave me here was that I simply might not be tightening the drain plugs enough. Now whenever I put the drain plugs in, I put a vise-grip on the end of the screwdriver to get more leverage. This might not be a problem with your allen head plugs though.

I'm not sure what type/year of motor you have but the gearcase seal kit for my 67 Evinrude 80 HP actually includes seals for a few other motors so there were "extra" pieces. It would be easy to ignore that driveshaft o-ring and assume the leftover pieces were for a different motor, especially if you're focused on the lower gearcase housing and not looking at the top of the shaft. The shop owner where I get my parts actually told me that the driveshaft o-ring is a common culprit for water instrusion before I even pulled my LU to find that o-ring missing. Best of luck getting it worked out. Keep us posted.
 

huckelberry

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Sep 1, 2008
Messages
56
Re: Water in L/U after re-seal

Ok, now I'm confused. Especially after the fight that I had with my 25 hp LU. I thought that the driveshaft o ring went up to the top of the driveshaft where it connects to the power head to keep water out of the splines. Also, I read on another thread that driveshaft seals were a common culprit for LU water intrusion. I just want to make sure that I put the o ring in the correct place. Any clarification would be helpful.
 

jasper60103

Commander
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Sep 18, 2008
Messages
2,055
Re: Water in L/U after re-seal

Yes, I was confused as well for a while.

There is a O-ring near the top of the driveshaft in a groove just below the splines.

Also, there is a driveshaft seal on top of the lower unit housing underneath the impeller plate.

Hope this helps.
 

Evinrookie

Petty Officer 2nd Class
Joined
Aug 20, 2007
Messages
100
Re: Water in L/U after re-seal

I just wanted to check in to see if you got the problem resolved Cricket. Jasper explained it correctly about the location of the seals. Again, I don't know what year motor you have but check out

http://epc.brp.com

You should be able to find a parts diagram for your motor showing all the seals for your LU.
 
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