Replacing Shift Shaft seal 9.8

deftones

Cadet
Joined
Jun 13, 2013
Messages
16
Hey everyone,

Im wondering if anyone know hows to replace the lower shift shaft seal that sits in the bushing on my 68 mercury 9.8?

Its pressed in and have the new seal just cant get the old seal out of the bushing. any help appreciated!

Mike
 

emckelvy

Commander
Joined
Jan 16, 2004
Messages
2,506
Re: Replacing Shift Shaft seal 9.8

Mike, they can be a real Bugger to get out! Be very careful 'cause the sides of the bushing where the seal sits are very very thin, and it's easy to bust it out when trying to extract the seal.

You may have good luck prying out the rubber portion of the seal, then you'll be able to get at the metal ring that's left. Very carefully pry up underneath the seal with a small screwdriver or other prying tool, until you can work it out.

Another method that might do the trick, try heating up the bushing and see if it releases the seal. Just be sure not to melt the aluminum! It won't take much, the heat from a propane torch should do the trick.

To hold the bushing while you're prying on the seal, it's handy to have an empty lower unit to stick the bushing in! Failing that, you could find a rod with the right diameter to hold the bushing while prying. If you can get some leverage on it, it should come out.

HTH, keep us posted, the info should be useful to others doing the same repair............ed
 

deftones

Cadet
Joined
Jun 13, 2013
Messages
16
Re: Replacing Shift Shaft seal 9.8

Hey thanks for the info!

Well everything i tried to pry it out just wouldnt work. So what i ended up doing was i removed the rubber with a knife. Then i busted out the dremel and carefully cut into the flange of the seal. Once cut with that weak point it basically fell out! Then i pressed the new one in.


thanks for your help.
 

emckelvy

Commander
Joined
Jan 16, 2004
Messages
2,506
Re: Replacing Shift Shaft seal 9.8

Glad you got it! Good idea on use of the Dremel, I'll have to remember that next time I'm fighting a bad seal!

Cheers..........ed
 
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