Shift shaft o-ring?

[tgissel]

Okay I have now taken the lower-unit back off of my 57' Johnson 35 horse and discovered that it leaks in the area of the shift shaft. Alcan had previously mentioned, this but I thought that I had changed it. My question is how do I get to the o-ring inside the case, I do not see it either from the top or the bottom the with the gears removed? All that I see is a brass bushing of some sort. Any suggestions? Thanks,

 

[alcan]

Re: Shift shaft o-ring?

You will need a long punch with a slite sholder cut aprox.1" from the end. Poke the punch through the housing,o-ring and bushing. Tap bushing out. Install new gasket,o-ring, use a small amount of sealer on bushing and reinstall. If you can not make a suitable tool, order one from you OMC dealer.

 

[Paul Moir]

Re: Shift shaft o-ring?

My one measures about .295" for about 1-1/4". Overall it's about 12" long and is made from 3/8" rod.<br />If you can get at the bushing with a tap, you can tap it with a 5/16 fine tap, thread in a bolt, and tap against that.<br />Good luck!

 

[tgissel]

Re: Shift shaft o-ring?

Thanks Alcan and Paul, I got the old one out and the o-ring looked pretty good but the gasket was shot. I put the new stuff in it and it feels considerably tighter. One more question I can not find a torque pattern or how much to torque the 9 slotted screws on the bottom of the foot? I just tightened them last time starting in the middle and went to the very precise torque of a grunt and a half. Thanks again,

 

[Paul Moir]

Re: Shift shaft o-ring?

There's no specific torque other than to follow the OMC 'Standard Torque' for bolts. In the case of those screws (1/4"-20) that is 60-80 in/lbs. Nor is there a stated pattern, but obviously starting in the centre and working your way out to the edges is the way to go.<br />After doing that, I pressure test my case to a couple (1-3) psi and retorque as necessary.