1978 Johnson Javelin 85hp shims

[Gary85_]

Replacing seals in my lower unit and found I had 1 1/2 shims of what is suppose to be a 3 shim set. Found the replacement shims online. .0002, .0003, .0004 are the sizes. Can someone tell me in what order they need to be installed?

 

[BoatBuoy]

Re: 1978 Johnson Javelin 85hp shims

From the parts diagram here http://www.ishopmarine.com/ishop/js...~A0000022~M0016677~M0016698~M0016700~C0247390 (item # 10)it looks like you only need one of the three.

 

[Gary85_]

Re: 1978 Johnson Javelin 85hp shims

It had 2 in it. One was OK, the other warn almost into. The 2 were stacked. I just figured because there were three listed that one of mine was completely gone.<br /><br />Hope someone can help me on this.

 

[BoatBuoy]

Re: 1978 Johnson Javelin 85hp shims

The number and thickness of shims, in most applications, will depend on the specification for end-play. A manual might tell you.

 

[Gary85_]

Re: 1978 Johnson Javelin 85hp shims

Is there anyone else that might have some input on this?

 

[McGR]

Re: 1978 Johnson Javelin 85hp shims

Your talking about the shims that go below the upper driveshaft bearing - right? If so, as BB mentioned, the proper amount/thickness depends on the end play, this thickness will change from one gear case to another. Therefore, OMC makes a tool (gauge) specifically for determining the correct shim thickness required. So there is no particular order of number of shims used, it just a matter of hitting the right dimension per the gauge. If you are only reasealing the l/u and not changing any mechanical parts, you should just reinstall the original shims.

 

[McGR]

Re: 1978 Johnson Javelin 85hp shims

After looking at the link above, I realize you are talking about the shim against the forward thrust bearing (not the one I had in mind). So, for the most part disregard my previous posting. What the correct procedure for shimming this is, I'm not sure. I'll see if I can dig this info out of one of my manuals - later...

 

[Gary85_]

Re: 1978 Johnson Javelin 85hp shims

Thanks for the posts. I figure it don't matter that much, I just would like it to be right when I assemble. They are still on order, so I still have a few more days to study before they get here.<br />If I don't get a good guess from someone, I will just close my eyes when putting them in. LOL!!!!

 

[Dhadley]

Re: 1978 Johnson Javelin 85hp shims

Are you indeed talking about the forward gear shims or the driveshaft shims?

 

[Gary85_]

Re: 1978 Johnson Javelin 85hp shims

I am indeed talking about item #10 in the diagram above. I'm not sure how my unit come from the factory but it did have 2 shims in it when I tore it apart. I figured the 3rd one was worn completely away. I am not sure how much work has been done on this unit before I bought it. All I know is, now it's my problem to try to fix. Because I am too tight wadded to pay someone else. Plus I am learning alot and have enjoyed the restoring proccess.

 

[DHPMARINE]

Re: 1978 Johnson Javelin 85hp shims

I think if you look again online,the shims are listed as required.Meaning you might need 2 of one part # and some more of the other part #s to acheive a certain thickness.This is determined by putting the driveshaft,seal housing,bearings etc.into a jig,and measuring to see what you actually need.<br /><br />You can stab at what you think you need.Shims are cheap.But gears ain't .The jig says what you need. <br /><br />DHP

 

[Gary85_]

Re: 1978 Johnson Javelin 85hp shims

Oh I see!!!! Well....Looks like it will be the old eyeball jig. LOL!!!<br />Anyway..<br />I did order one of each, so when they get here I will have to see what looks closest. But thank you, now I understand what the previous posts were trying to tell me.<br />Thanks to all!!!!