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25hp Mercury 1988 How do I remove this retainer

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bass_man

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"Hey all, this is my first pos

"Hey all, this is my first post.

I recently purchased an old 25hp mercury outboard which is in near immaculate condition. She runs just fine and starts both on the cord and key easy. As a matter of precaution I thought I'd change the water pump and gear box oil before taking her out on the water. I drained the oil (no water or debris in there) and removed the lower unit (easily done, no seizing). When I removed the water pump and wear plate I was horrified to find a lot of corrosion on what I can only describe as "the upper oil seal retainer". In my case this aluminium retainer is gold in colour. The top oil seal of the two was badly damaged but the bottom one was untouched. As a matter of precaution I have removed both (not without a fight!).

My question is - How I do I remove this retainer? Is it removable? I have hacked away most of the corroded parts. I will post a photo later today, but in the mean time you can see the part I’m talking about on this link by forum member Bryan Davis Post. (Thanks Bryan)http://www.marineengine.com/discus/messages/12479/148222.shtml It is the 5th picture down, showing the small round gold/bronze colour pice below the wearplate.

Many thanks in advance..

Ashley UK"
 
"I'd leave it alone. You

"I'd leave it alone. You said there was no water in the LU oil, so why mess with it?

Jeff"
 
"Hi Fastjeff,

Thanks for yo

"Hi Fastjeff,

Thanks for your reply - however as I mentioned this "piece" definately needs replacing as its corroded very badly and a new seal wouldn't sit properly. Any more advice?

Thanks"
 
Did you remove the old seal?

Did you remove the old seal? I hope not if it wasn't leaking. Best to leave well enough alone some times.

Jeff
 
"Hi again Jeff,

Yes - both

"Hi again Jeff,

Yes - both of the old seals were removed. The top seal was split open and rusted very badly, the second seal was showing signs of water damage. So, rather than run the risk of serious damage in the future I removed both. I would like to know how to removed the seal carrier so I can put a new one in as well as new seals.

Any ideas?

Cheers Ash"
 
"Oh boy! Usually, the prop sh

"Oh boy! Usually, the prop shaft has to come out so you can remove the bolt holding the pinion gear on. You then yank the driveshaft, which pull the water pump cartridge out.

That said, I've done it by making a puller that used the cartridge bolts. Tricky but possible.

Jeff"
 
"Ash, I will email you a pdf f

"Ash, I will email you a pdf file on the lower unit for this motor - may help out a bit..."
 
"Many thanks Jeff and many man

"Many thanks Jeff and many many many thanks Graham for the PDF. So - the 'carrier' piece that I refer to is actually called the "Gear Case Sleeve". In your PDF Graham, there is no mention on how to remove this..... If I can avoid having to take the whole lower gear case appart I will, but do you know of a suitabl way to remove the sleeve? i.e is it threaded in or tapped/pushed in? Should I try heating it as it's bound to have corroded?

Many thanks once again guys.

Ash"
 
"You seem like a smart guy. He

"You seem like a smart guy. Here is a little advise.Before you destroy the case take it in to someone that knows how to deal with this type of problem and have it resealed. It doesn't cost that much. Not near as much as a new case if you break it because of A you do not have the proper tools and B you do not have the experience to work on it.
Sometimes a guy just has to admit he needs to let the pros's handle the job. This sounds like one of those times.
A water pump service is one thing,a reseal of the lower unit is a whole different story. If everything is not correct,you could have gears hanging out the side of the case real quick like. Plus if it does leak after you have it resealed,its not your problem. Best of luck."
 
"You mean the saver-sleeve? Th

"You mean the saver-sleeve? That is pressed on. I have taken it off of larger engines, but 25 i don't remember. Those don't usually leak.

The carrier is a left hand thread and a special tool gets it out and tourqed back in."
 
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