OMC intermediate question

[oh-u812?]

I have a leak it's under the top of the intermediate housing. There's an o ring under there I'm fixin to replace. I've looked at some diagrams and can't figure out what the proper name of the seal is. Is this a common place to develop a leak? Anyhow I found an o ring and I'm gonna give er a whirl.

 

[Manipulator]

Re: OMC intermediate question

I have a leak it's under the top of the intermediate housing. There's an o ring under there I'm fixin to replace. I've looked at some diagrams and can't figure out what the proper name of the seal is. Is this a common place to develop a leak? Anyhow I found an o ring and I'm gonna give er a whirl.

Are you talking about the Oil Reservior Gasket? # 1 on the diagram. Doesn't appear to be an o-ring.

http://www.masonmarine.net/index.php?cPath=23_26_396_454

looks like its .39 cents

 

[oh-u812?]

Re: OMC intermediate question

Negative. It's under the location where the dipstick is on the intermediate. There's a spring and a gear underneath that cover.

 

[whywhyzed]

Re: OMC intermediate question

there is no dipstick on the intermediate. I think you mean upper gear case - there is a flat rubber-sort of gasket required under that plug/dipstick.

 

[Manipulator]

Re: OMC intermediate question

kjdkjd is right, it's the upper. I thought something wasn't right when you said it was on top and was an o-ring as I never saw one on the IM.

#2 it's $5.99
Maybe you can match one up. Doubt an auto parts store will have one that big.

 

[Manipulator]

Re: OMC intermediate question

I have a leak it's under the top of the intermediate housing. There's an o ring under there I'm fixin to replace. I've looked at some diagrams and can't figure out what the proper name of the seal is. Is this a common place to develop a leak? Anyhow I found an o ring and I'm gonna give er a whirl.

As far as "Is this a common place to develop a leak? " The answer is "yes" As is the answer for very seal in a OMC stringer. Damn things leak all over. Did you pressure test? I bet you find all kinds of seals leaking. Especially in the lower end of the upper unit.

 

[oh-u812?]

Re: OMC intermediate question

My bad. You guys are right. I stared at both of those diagrams earlier. I found one that should work. The seal in question is a 2" id o ring. When I did my pressure test its the only place I saw my soapy water bubbling.

 

[oh-u812?]

Re: OMC intermediate question

Oh yeah. Thanks.

 

[Manipulator]

Re: OMC intermediate question

If the shift cable has been removed, you can remove the cover on the upper unit (4 small bolts and will come off with the dipstick) and pull the drive right out of the lower. Then you can pump with air and dunk the bottom in a tub of water and look for air bubbles. Some times the seals in lower around the water pump leak. Won't be able to see this with the lower and upper still attached. Just a thought.

 

[fendersfender]

Re: OMC intermediate question

while you have this thing apart, you may as well seal the whole thing.....these gearcases are prone to leak.....may as well do it now to save yourself trouble later....at the very least replace steering bushings and seals, as this is the most common leak (for me anyways)

 

[72IMPAZTEC]

Re: OMC intermediate question

Hello,

I'm new here, saw this thread, and thought y'all might be able to help.

Reverencing the first exploded view, #27 intermediate shaft bearings.

I have a 71 OMC 215HP stringer. It locked up on me, and I thought it was those bearings. Removed them, only to find there is only one bearing in there. A tapered roller. it is a bit worn, but not galled and I don't think it was my lock up problem. BUT, how, do you tension that bearing? How do you control thrust?

Does the Ball Gear, put pressure on it's opposite when the outdrive is down?

Any leads on said bearing?

Thanks,

Jon

 

[Boomyal]

Re: OMC intermediate question

Hello,

I'm new here, saw this thread, and thought y'all might be able to help.

Reverencing the first exploded view, #27 intermediate shaft bearings.

I have a 71 OMC 215HP stringer. It locked up on me, and I thought it was those bearings. Removed them, only to find there is only one bearing in there. A tapered roller. it is a bit worn, but not galled and I don't think it was my lock up problem. BUT, how, do you tension that bearing? How do you control thrust?

Does the Ball Gear, put pressure on it's opposite when the outdrive is down?

Any leads on said bearing?

Thanks,

Jon

That should be a double tapered roller bearing in front of the ball gear and shaft retainer plate. The other end of the shaft is supported in the solid steel engine coupler bolted to the flywheel.

I'm not sure about the shimming, if any but the bearings are pressed on to the shaft.

If you are locked up, I would check your upper I/O gears. I ran mine out of oil once and the boat came to a screeching halt.

 

[72IMPAZTEC]

Re: OMC intermediate question

Thanks, for the reply.


Yes, according to the service manual, I agree, it should be two bearings.

BUT, this one, only has the one. No marks on the shaft where there was another one. Also, the housing, where the race is, is ummmmmmm not really tapered, but not round, the upper part, where the oil is installed, is higher than the rest of it. There is NO way you could get another race in there.

I'm pulling what little hair I have out.

I will check the upper housing, thanks,

I have another out drive, I took the intermediate shaft out of it as well, it is the older style, with two greased bearings, one flat roller, and one ball bearing. But it's upper gear set seems to be in very good condition. I would put it on the outdrive and put it back together, if I could figgure out the shaft and bearing deal....

Thanks.

 

[Boomyal]

Re: OMC intermediate question

I just noticed that you had a '71. Not familiar with that year but if the bearing and race is in good shape and it had oil, I would assume it had been set up properly. If it had seized it would be very evident.