1957 7.5 Johnson Gearcase Housing Seal Kit

[mfw]

I just removed the gearcase housing and it looks pretty confusing. I ordered the manual and am waiting on that. The gearcase housing seal kit that I ordered came with no instructions. As a new guy to the hobby am I biting off way more then I can chew by attempting a re seal of this unit? Or will this whole thing make sense once I get my manual. I watched the video on how to drop the lower unit which was really helpful. But when I was pulling mine apart he had seals and washers on the drive shaft that I didnt have. All I had was a brass collar over the spring. I am hoping this was different since the video was of an Evinrude 7.5 instead of a Johnson. Is there an online diagram where I can sift through to figure this out? If not I will wait for my manual. Any suggestions would be great.

MFW

 

[Daviet]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

It will make more sense when you look at the manual. Look at the site below, select your model number and look at the parts breakdown for your engine, maybe that will help you out.
http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1957&hp=7.5

 

[mfw]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

Thanks, I found a diagram and cross refrenced the parts with the diagram. Doesn't look like its going to be that bad. Just have to figure out how to pull the 2 seals. I will go to autozone and try to find a seal puller. Also, does the fill plug and drain plug have a plastic washer in the kit (2 of them)? Thanks for the help.

 

[Daviet]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

Yes, the drain/vent screws have a plastic seal washers. Make sure you get the old ones out, might be made of paper.

 

[mfw]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

Ok good those were the last 2 things I needed to figure out where they went. Since I have it all apart, do you think I should change the head gasket and exhaust cover gasket? If so, where would I get them?

 

[Daviet]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

If it were me, and there were no problems with the head and exhaust gaskets, I wouldn't mess with them. Go the the second post and look at that site to get part numbers and see if they have them, they might be available here on iboats.

 

[kfa4303]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

Ditto. If it ain't broke don't fix it with regards to the head gasket. You can remove the driveshaft and propshaft seals with a seal puller available at any hardware/autoparts store for about $10. Here's a pic. And a link that can walk you through changing seals.

http://forums.iboats.com/showthread.php?t=277190&highlight=lower+unit+seal+kit+installation

Seal Puller:

http://www.diseno-art.com/images_3/o_ring_and_seal_puller.jpg

 

[mfw]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

I finally figured it. I took it apart and put it back together and it works.... I think. I am going to run it more tomorrow and then take it out on the lake. I am still trying to get the compression up in that top cylinder, so I will seafoam it and run it for awhile on the lake. The hardest part was getting that stupid seal off the prop shaft. I am not even going to say how long it took me. Thanks for all the help.

MFW

 

[Nconn]

Re: 1957 7.5 Johnson Gearcase Housing Seal Kit

It will make more sense when you look at the manual. Look at the site below, select your model number and look at the parts breakdown for your engine, maybe that will help you out.
http://www.*****************/parts/johnson-evinrude-parts.php?year=1957&hp=7.5

I have the exact situation but cannot open the site Daviet supplied to many stars blocking out most of the address, need help, Have no idea how to install this kit 18-2679 for the lower gear housing seal kit for a Johnson/Evinrude 1957 7.5 motor

 

[Nconn]

Oh excuse me I am wrong it is a 1954 motor everything else is the same

 

[F_R]

I believe the URL might be disabled because it is an iboats competitor. We wouldn't go to a nice restaurant and tell the patrons to go to the restaurant across the street, right?

 

[boobie]

This post is over 5 years old.................

 

[GA_Boater]

I have the exact situation but cannot open the site Daviet supplied to many stars blocking out most of the address, need help, Have no idea how to install this kit 18-2679 for the lower gear housing seal kit for a Johnson/Evinrude 1957 7.5 motor

Nconn


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