O-Ring Driveshaft 1991 70HP evinrude

yammyman

Seaman
Joined
Jun 22, 2007
Messages
59
I cannot figure out where to put part number 58 in the diagram below.

The water pump repair kit came with two orings. The guy at the parts counter said to go with the one that fits the drive shaft better.
But where does it go?
 

Will Bark

Lieutenant
Joined
Aug 1, 2010
Messages
1,470
Re: O-Ring Driveshaft 1991 70HP evinrude

Should go at the top of the driveshaft in the groove just below the splines; this is to keep water out of crankshaft so it doesn't rust. You do know to grease the splines but not the top of the shaft?
 

yammyman

Seaman
Joined
Jun 22, 2007
Messages
59
Re: O-Ring Driveshaft 1991 70HP evinrude

Should go at the top of the driveshaft in the groove just below the splines; this is to keep water out of crankshaft so it doesn't rust. You do know to grease the splines but not the top of the shaft?

Ok Thanks. I saw the "wear mark" under the splines and figured thats where it goes. The only problem is the old ORing wasn't on the shaft when I pulled the lower unit off. Is it safe to assume the the old oring is still on the power headside of things?
 

WernerF

Petty Officer 1st Class
Joined
Sep 5, 2011
Messages
320
Re: O-Ring Driveshaft 1991 70HP evinrude

The 1989 model has the driveshaft o-ring mounted in a groove in the crankshaft. It stays there when the driveshaft is pulled out of the crankshaft. I'm pretty sure it's the same for the 1991 model.
 

yammyman

Seaman
Joined
Jun 22, 2007
Messages
59
Re: O-Ring Driveshaft 1991 70HP evinrude

Thanks guys. I have it back together, but now the shift shaft moves, but the motor won"t come out of gear. What did I do wrong, and how do I fix it?
 

boobie

Supreme Mariner
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Nov 5, 2009
Messages
20,826
Re: O-Ring Driveshaft 1991 70HP evinrude

What did you do to the lower unit before posting ??
 

yammyman

Seaman
Joined
Jun 22, 2007
Messages
59
Re: O-Ring Driveshaft 1991 70HP evinrude

Before posting I took the lower unit off and changed the Seals and ORing below the water pump and put on a new water pump. I disconnected the shift shaft from the linkage under the bottom carb before removing the lower unit. It was in neutral position when I pulled the lower unit. When I pulled the lower unit the shift shaft kind of slipped. It is almost like the shift shaft became disconnected from somethingin the foot.
 

boobie

Supreme Mariner
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Nov 5, 2009
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20,826
Re: O-Ring Driveshaft 1991 70HP evinrude

Did you rotate the shift shaft when you had it apart ??
 

yammyman

Seaman
Joined
Jun 22, 2007
Messages
59
Re: O-Ring Driveshaft 1991 70HP evinrude

It very well could have backed out. The lower unit took a ride in the back of my truck. I imagine the vibrations could have backed out the shift shaft. I will be pulling the lower unit shortly.
Thanks for the help.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: O-Ring Driveshaft 1991 70HP evinrude

When you have the lower unit off, screw the shift shaft back in and go to the top secret file at the beginning of this forum and look up the shift rod height. Set that and then check the shifting for F-N-R.
 
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