Shift shaft o-ring problem

[gwoloshyn]

1966 Evinrude Ski-twin 33hp model no. 33653

I'm having trouble identifying what I need to do in order to replace the o-ring in my shift shaft bushing. The o-ring I received in my lower unit rebuild kit does not fit inside the shift shaft bushing, as it is too big. According to the marineengine.com parts diagram, there is only 1 o-ring and gasket, however I pulled out 2 o-rings. Can anyone give me any info as far as the correct placement and order of these parts?

 

[kfa4303]

Re: Shift shaft o-ring problem

hi gwoloshyn. I used to have a '66 33 hp too. Don't worry, you're not the first one to have trouble with that o-ring. the new one does look a little on the "plump" side, but I would use it if it fits. it should be nice and tight. putting a bit of vaseline on the tip of the shift rod can help it to pass through the tight, new o-ring. here's a link that can walk you through a whole lower unit reseal job. it's for an 18 hp, but it's the same basic process. holler if you get stuck.

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

 

[F_R]

Re: Shift shaft o-ring problem

The 33hp and 40hp use a 301877 o-ring, and a 304764 gasket. 18hp and smaller use the same o-r ing, but no gasket.

The o-ring is somewhat larger than the recess, and has to be squeezed in. That's so the shift rod has some wiggle room without leaking.

 

[gwoloshyn]

Re: Shift shaft o-ring problem

Thanks for the help. Should be all set to go re-assemble now.