89 Force 85 Lower unit...confusing

[scottmm73]

Gentlemen,

Trying to replace all the seals and gaskets on my lower unit while I repair the powerhead. I have the clymer manual for the respective year and I'm a bit confused on what I am looking at.

I'm not seeing the stamped bearing plate (around center of supposed bearing spool) in the parts manuals and maintenance manual. It appears as if there is no seam around the outer edge, which would indicate that the bearing spool can be removed.

If anyone is familiar, please explain the process of removing and replacing the seals/o-rings. The manual shows that the bearing spool should have two o-rings and a prop shaft seal. Is the prop shaft seal the stamped piece I am looking at?

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Please disregard. It does come out. I am no longer confused.

 

[emoney]

Re: 89 Force 85 Lower unit...confusing

And here I was just about to help. Oh well, I'll keep my information for someone who appreciates me. (Truth is, I have no idea and I'm pretty sure you're not even speaking American, but good luck any way!)

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Well let's keep this going. Now that I have the bearing spool removed. How do I remove the seal? The spool is aluminum (it appears) but I don't want to damage it.

I don't have special seal removal tools. Will this be difficult to pry with a screwdriver?

 

[Frank Acampora]

Re: 89 Force 85 Lower unit...confusing

It is very difficult to pry out the seal without a seal puller. Easier to reach through from the other side with a fairly large screwdriver and hammer it out. Work back and forth as if it were a lug pattern to drive it out evenly. Don't be surprised if the screwdriver punctures the seal.

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Thanks Frank, worked like a charm. All seals and gaskets are replaced, awaiting install tomorrow morning.

 

[swiggins]

Re: 89 Force 85 Lower unit...confusing

Please disregard. It does come out. I am no longer confused.

How did you get the spool out, mine won't budge. please help!
Thanks
Shawn

 

[jerryjerry05]

Re: 89 Force 85 Lower unit...confusing

If your talking about the carrier???

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

I used a harmonic balance puller and two 1/4 by 8" carrier bolts and pulled it right out.

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Okay Gentlemen,

Reviving this old thread. Last year I replaced the seals and o-rings on this lower unit. However, when winterizing, I again had water in the gear case and oil leaking from the water intake. I decided I would look into pressurizing the system and checking it out. I guess I should have done this before taking it out last year, I only had it out 4 times before I put it up for the winter. Needless to say, when pressure testing it last night, It would not hold any air period. The air was coming out as fast as it was going in. I sprayed the shift rod seal and it was leaking from there. I also pulled the bearing spool and the inboard o-ring was cut completely through. I must have done this when I was reinstalling.

Now for my questions. The bearing spool has two o-rings, one inboard and one outboard. Are there different size o-rings for each side or are they both the same. The Quick Silver seal kit has 3 o-rings that appear to fit this. Can someone post a picture or explain what o-rings go where. As far as the shift rod seal, the seal kit did not have one that came with it and it appears you cannot order it. Any suggestions?

 

[maytheforcebewithus]

Re: 89 Force 85 Lower unit...confusing

try this site for your shift rod seal its # 56 and listed as available


Force 85 HP (1989) GEAR HOUSING Parts

 

[BlueFishCrisis]

Re: 89 Force 85 Lower unit...confusing

try this site for your shift rod seal its # 56 and listed as available


Force 85 HP (1989) GEAR HOUSING Parts

Also note that parts 10 and 12 carry different part numbers, therefore have different dimensions or attributes in some respect.....

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Also note that parts 10 and 12 carry different part numbers, therefore have different dimensions or attributes in some respect.....

Yes, I understand this. However, in the seal kit the O-rings are not separated with a part number, they are just bundled loosely and like I said there are 3 O-rings that fit the bearing spool. My question which goes where? Two appear the same size and one is much bigger.

 

[BlueFishCrisis]

Re: 89 Force 85 Lower unit...confusing

Yes, I understand this. However, in the seal kit the O-rings are not separated with a part number, they are just bundled loosely and like I said there are 3 O-rings that fit the bearing spool. My question which goes where? Two appear the same size and one is much bigger.

I installed based on part number and the diagram, so unfortunately I don't know the exact differences and I did not compare side by side to try and figure out why they were two part numbers. I rebuilt last spring, so going from memory.....

 

[Frank Acampora]

Re: 89 Force 85 Lower unit...confusing

The spool is "stepped" for ease of installation. The inner O-ring is smaller than the outer one. Both O rings should fit so that they are slightly above the surface of the spool--that is, they should be slightly thicker than the depth of the groove, They should be of such diameter that they are NOT stretched when installed but not set loosely into the groove either.

When re-installing the spool lubricate both O Rings with either anti-seize or lower unit oil. Be certain that the inner O ring seating surface is clean and smooth before installing the spool. It should seat in smoothly with just a bit of force necessary.

Relative position of the four bolts does not matter but I like to position the reverse gear carrier so that the bolts are two on the bottom. Remember the four small O rings under the spool bolt washers. These are important because the spool bolts communicate directly into the gearcase. Failure to include these O rings will result in water intrusion.

Also remember the two half circle clips. These clips are the only things that hold the guts of the lower unit in. Failure to include them or improper installation will result in losing the spool and gearpak--usually in reverse.

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Thanks, Frank.

 

[scottmm73]

Re: 89 Force 85 Lower unit...confusing

Okay, Another question.

The old shift rod seal/bellows as pictured is obsolete.

I'm guessing this is the new one replacing the bellows. Pictured below, am I correct?

How do you go about removing the old seal and replacing the new one? I don't want to take it apart until I have this figured out.

 

[healey8390]

Re: 89 Force 85 Lower unit...confusing

Yes that should work. It looks cheesy like the one for my model (1983 Chrysler 90HP). You'd think they'd make the older one obslolete, I like the way your original one looks.

 

[healey8390]

Re: 89 Force 85 Lower unit...confusing

Yes that should work. It looks cheesy like the one for my model (1983 Chrysler 90HP). You'd think they'd make the older one obslolete, I like the way your original one looks.

As far as taking it out, you have to take off the top plate (I'm not sure what it's called), flip it over and carefully hammer it out with something.

 

[jerryjerry05]

Re: 89 Force 85 Lower unit...confusing

I THINK!!! That's the seal that goes in another part.
The rubber bellows went by/by and it was replaced with a new/old style cover.
You only have the seal and need the plate.
Look up the part #s #53 in the diagram.
Someone listed a replacement part on here. Not sure WHO??
I can get an old one if you can't find the part?