1987 50hp johnson lower unit problems

[fpctim]

i went out the other day and blew out my lower unit ,i have no gears at all ,i have not tore it down yet for the reason if i do i want to rebuild it, or find a used one anyone know where to get used lower units or the rebuild parts at a good price,also could anyone tell me why the lower unit was presureised with water in it ,when i took lower unit gear lube screw out it had pressure after two days with water in it

 

[Waterbugtoo]

Re: 1987 50hp johnson lower unit problems

Because seals work in two directions not one. You can suck in water and still retain it under pressure, just like you can loose oil but intake no water. If you dont have the tools to shim a rebuild, you cannot rebuild it yourself and have it last more than a few minutes.

 

[fpctim]

Re: 1987 50hp johnson lower unit problems

im a auto tech with 14 years under my belt and 14 years of tools and have an account with snap on

 

[lpkirby]

Re: 1987 50hp johnson lower unit problems

I am learning here.... What tools are needed to rebuild the lower end. Anything special?<br /><br />Thanks

 

[Hooty]

Re: 1987 50hp johnson lower unit problems

fpctim,<br />You can rebuild the lower unit but one of the speciality tools you'll need is a thrust bearing shim gauge. This is a OMC tool. Your best bet would be to get a manual and have a look at it before you start and see what's involved.<br /><br />c/6<br /><br />Hooty

 

[fpctim]

Re: 1987 50hp johnson lower unit problems

i do have the book on this motor and if i can rebuild one of them jap cars with no push rods a 2 over head cams i think i can rebuild the lower unit but the problem is i will have to find a place to buy the tools you all say i need

 

[clanton]

Re: 1987 50hp johnson lower unit problems

There are two Service Bulletins on shimming this gear case, SB 2224 dated April 1990 changed the collar on the shimming tool, new collar is pn 328361. Service Bulletin 2200 dated Feb 1988, you have to id the gearcase by looking at cavity farward of the driveshaft seal housing, and shim according to the stamped mark. The drive shaft was made larger, a production change I think, when you buy waterpump kit comes with 2 different impellers for the 2 sizes of drives shafts. The drive shaft was changed because of breakage.

 

[Hooty]

Re: 1987 50hp johnson lower unit problems

If you can find an OMC mech., you may get him to shim it for you with his gauge and you do the rest. <br /><br />c/6<br /><br />Hooty

 

[clanton]

Re: 1987 50hp johnson lower unit problems

Ask Joe Reeves to do it for you, may be only 1 1/2 hours from you, and have some of the parts you need.

 

[fpctim]

Re: 1987 50hp johnson lower unit problems

how do i get a hold of joe reeves

 

[clanton]

Re: 1987 50hp johnson lower unit problems

He should show up tomorrow.

 

[sloopy]

Re: 1987 50hp johnson lower unit problems

Joe is the coolest guy on I boats and has 30 plus years experiance with OMC!

 

[Joe Reeves]

Re: 1987 50hp johnson lower unit problems

I appreciate the compliments my friends but I no longer have that specific tool. I should think that there must be at least one Evinrude/Johnson mechanic in Orlando that would shim that shaft for a reasonable fee. Shouldn't take more than a half hour..... a hour tops.

 

[sloopy]

Re: 1987 50hp johnson lower unit problems

I called up my mechanic and he said that if someone is fixing it them selfs they have to pay double for special services? is'nt there something illegal about that? but if it is not I quess I would do the same thing too if I were a mechanic! today more and more people are fixing thier own engines!

 

[sloopy]

Re: 1987 50hp johnson lower unit problems

I called up my mechanic and he said that if someone is fixing it them selfs they have to pay double for special services? is'nt there something illegal about that? but if it is not I quess I would do the same thing too if I were a mechanic! today more and more people are fixing thier own engines!

 

[chumbucket]

Re: 1987 50hp johnson lower unit problems

I will check down in Vineland and see if Joe is around.He might want to stay in the warm weather ??????????? How about that Joe <grin>

 

[Waterbugtoo]

Re: 1987 50hp johnson lower unit problems

Sloopy Doopy, think about your comment for a minute. If everyone used a mechanic only for a special tool, would they be able to make a living? Its the same as asking a mechanic to diagnose a motor problem for you so you can leave and fix it yourself. That simply does not compute. Why would anyone expect a career mechanic to do those things? They invest much money and time in training and are not in the business of cutting their own throats. Many here give advice because they're nice guys and enjoy conversation of the subject, but asking them to physically do part of the job for you to save a buck is crossing the line.

 

[fpctim]

Re: 1987 50hp johnson lower unit problems

as a 14 year auto tech i do it all the time ,i help whoever needs it that cant afford it,ive been known to do a brake job for a cake

 

[clanton]

Re: 1987 50hp johnson lower unit problems

Go to www.am-tech.org, click on tech roster. You will see a list of names of techs, by state and city. There are about 10 in your area. One of these may have the tool. It is also inportant that he have the two service bulletins 2200, and 2224 to get the correct shimming.

 

[sloopy]

Re: 1987 50hp johnson lower unit problems

sorry I think a worded it wrong