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1985 Evinrude 2 stroke

J

J.Clinker

New member
I seek your advice.
I have fitted a water pump kit and started to assemble the gear case to the body, it felt a little jammed just as the gear shift shaft reached the connecting clamp so I pulled it out just to check that all was ok.
The O ring at the motor end of the drive shaft just below the spline had disappeared, I have tried reaching up inside the body with a stiff wire probe to dislodge it to no avail.
What should I do now: put on a new one and reassemble it, reassemble and hope the shaft finds the O ring, or disconnect the body from the motor and look for it?
Any opinions will be helpful to proceed with the problem.
Thanks John
 
Beginning in 1984 they did NOT use an o-ring at the top of the driveshaft.-----But I can not see your motor.----I do not know if lower unit / driveshaft is off an 85 model.----I do not know if your powerhead is original either.----Any pictures ? -----serial # of powerhead the same as tag on the midsection ?
 
racerone
I cannot see the serial # on the power head ? There are some photos of the motor that may help.

Some observations though : the rubber seal/grommet on the high side of the pump housing was stopping the fitting together of the gearbox and mid bodies. Looking at the original one it had been cut down by 3 or 4 mls.

The replacement pump impeller ordered in a kit is about 5 thou bigger in dia than the drive shaft, I ordered 2 other separately from other shops and they are all the same size. The original impeller a much better fit but not good enough to use.

When I separated the gear box the O ring at the top of the shaft was already in pieces.

The large O ring on the top of the pump housing doesn't [ I could be wrong here ] seem to have a proper bedding into the mid body?

Question 1 : what would an O ring at the motor end of the shaft actually seal?
2 : what is the purpose to cut a flat on the drive shaft for the impeller key rather than a milled slot.

Thanks John.
 
racerone
I cannot see the serial # on the power head ?

Some observations though : the rubber seal/grommet on the high side of the pump housing was stopping the fitting together of the gearbox and mid bodies. Looking at the original one it had been cut down by 3 or 4 mls.

The replacement pump impeller ordered is about 5 thou bigger in dia than the drive shaft, I ordered 2 other separately from other shops and they are all the same size. The original impeller a much better fit.

When I separated the gear box the O ring at the top of the shaft was already in pieces.
 
Cutting a flat ( using a drive pin ) on the driveshaft does not weaken the shaft as much as a groove for a key.-----I own more than 1 of these lower units.----Factory parts are never an issue.----An o-ring keeps water out of the spline to prevent rust !----A 1983 uses an o-ring.-----A 1985 uses a seal up there.-----The water pump is the same from 1974 to 2005 and never an issue with factory parts.
 
Racerone,
Hello, if after 1984 evinrude used a seal and not an O ring did they keep using the same drive shaft as mine in the attachment?
What I am wondering is, should I, it being an 1985 expect it to seal when assembled?
Thanks John
 
Newer driveshafts do NOT have an o-ring groove.-----I can not see what you have.----It can be difficult to explain things to someone who owns 1 motor.
 
J.Clinker said:
One more try!
Click to expand...
Resize your photos to under 1Mb

It can be done right from this site. See the little button at the bottom of where you type, the one that says ATTACH FILES?

When you click on it, you get the option to chose a file from “photo library”, or take a photo.

Once you chose one from the library that is already on your phone, (it will open your entire library), select the one you want. Now, before you do anything else, look at the bottom left corner- it will say OPTIONS.

Choose that & you get choices of LARGE, MED, SMALL. Try one, it will give the new size that will be attached. If it’s less than 1Mb, say 294Kb, then select DONE, then ADD, up at the top right.

NOTE: I’ve found, when using an iPad, the above mentioned “OPTIONS” was replaced in the last IOS update. it’s now two little slide buttons, in the bottom right. Tap that & you will get the window to select size.
Voila,
 

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Hello, success with the photos, thanks.
A summary as I think: I have a drive shaft pre 1984. A mid section 1985.
The rest to be figured out.
IMG_0716.jpeg
IMG_0697.jpeg
 
racerone said:
Newer driveshafts do NOT have an o-ring groove.-----I can not see what you have.----It can be difficult to explain things to someone who owns 1 motor.
Click to expand...
Hello racer one, are you able to distinguish anything from the photos that may lead to a solution for me?
Many thanks
John
 
Hi. It's Tim in Duluth MN. The photos are reduced in size a bit too much. You should stay as close to 1000K as possible in order to preserve detail. You're getting better however at just being able to show the photos. One of the main reasons they did away with the o-ring on top of the shaft is that the groove to hold the o-ring in place weakened the shaft and causing problems with shearing in case of accident. I just repaired one where the shaft had sheared off and I drilled a hole into the stub in order to pull it out. In your case the shaft is not right, if in fact the powerhead is a 1985. What I would do in your case is install what you have and butter a bit of quality nickel anti-seize compound on those splines. We are freshwater lakes up here so we don't have to be quite as fussy as those motors exposed to salt or brackish waters. So my best guess as what happened in your case is the o-ring was broken off because it was too tight for your power head seal retainer. In other words the o-ring sticks out farther than what that seal retainer will allow to enter. Where is Racer now? He will walk you through this.
 
Hello Tim, Thanks for your thoughts, I understand things more clearly. The anti seize is a good idea.
I will try better photos of the power head in case it may reveal identification.
After learning where both Edcriss and yourself are from I wonder if Evinrude Australia had the same production dates as Evinrude America?
I am on the Mornington Peninsula situated on the southern coast of Australia.
Many thanks John.
 

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Nice. I spent a month gold coast Brisbane to Cooktown. Loved it, fabulous people, camped as we went. Plenty 👍 on my driving, ha! Good or bad? O well, hardest part was finding good water.
I would say that the second set of your photos turned out much better. It's hard to say on whether or not the components are "year correct" on your motor. However, they should be.
 
So not much freshwater in your area, only Devilbend and Bittern reservoirs. Don't think watercraft are allowed, pretty restrictive, I think. Your going to be saltwater. It's looking like your motor has been very well kept.
 
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