Removing Prop Shaft 9.8hp

[db21]

I just got a 1971 9.8hp, model 110. It seemed to keep getting stuck in forward. No forward or reverse. I could get the shift shaft back in the cam and then put it all back together and then after a couple of shifts it would get stuck in forward....seems like the shaft would come out of the cam, but hard to be sure...

So I am taking the lower unit apart to get a better look at the cam to see what is up. I am struck trying to remove the drive shaft, so I can remove forward gear. I have the bolt off the pinion inside, but can't seem to get the driveshaft out from the bearing. Have removed the snap ring but it is in there good. Any ideas on how to remove?

Presume the next question will be how to remove the forward gear to get to the cam. Will that come out easily?

Appreciate your advice!

 

[db21]

Re: Removing Prop Shaft 9.8hp

I just got a 1971 9.8hp, model 110. It seemed to keep getting stuck in forward. No neutral or reverse. I could get the shift shaft back in the cam and then put it all back together and then after a couple of shifts it would get stuck in forward....seems like the shaft would come out of the cam, but hard to be sure...

So I am taking the lower unit apart to get a better look at the cam to see what is up. I am struck trying to remove the drive shaft, so I can remove forward gear. I have the bolt off the pinion inside, but can't seem to get the driveshaft out from the bearing. Have removed the snap ring but it is in there good. Any ideas on how to remove?

Presume the next question will be how to remove the forward gear to get to the cam. Will that come out easily?

Appreciate your advice!

That should read removing drive shaft...and there is no neutral or reverse. (Sorry couldn't get edit post to work!)

 

[carholme]

Re: Removing Prop Shaft 9.8hp

With the waterpump disassembled, and the pinion bolt removed, clamp the driveshaft in a soft jawed vice and tap the gearcase off the d/s and bearing. The fwd gear will usually drop out if you tap the open end of the gearcase againsts a2x4.

If you can raise the shift shaft that far to dislodge the cam, you have lost the circlip on the shaft.

What is your engine s/n and I'll get you the parts listing and a 110 manual.

Gerry

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

With the waterpump disassembled, and the pinion bolt removed, clamp the driveshaft in a soft jawed vice and tap the gearcase off the d/s and bearing. The fwd gear will usually drop out if you tap the open end of the gearcase againsts a2x4.

If you can raise the shift shaft that far to dislodge the cam, you have lost the circlip on the shaft.

What is your engine s/n and I'll get you the parts listing and a 110 manual.

Gerry

Gerry

Hi Gerry,
Thanks that's just the advice I was looking for! I wasn't aware of the circlip on the cam, but that would certainly make sense. Shame its such a job to fix something so simple.

My serial number is 3186008. The parts list and manual would be a great help, thanks again!
David

 

[carholme]

Re: Removing Prop Shaft 9.8hp

Your s/n is a model:

1110101 MERCURY 1971 9.8

Parts Listing:

http://www.crowleymarine.com/mercury-outboard/453.cfm

Service Manual P/N: 90-86136--1

http://www.ebay.com/itm/USED-93-Mercury-Outboard-4GNAT-2-Cyl-Service-Manual-/270801861770

Or here is a link to the condensed version of the Clymer manual. Let the page load for several seconds and then download soonest to your computer as the link is short lived. This one doesn't quite reach to your year but should help you out.

http://web.ebscohost.com/serrc/pdf?...a-9c67-927ce9ef76ff@sessionmgr4&vid=7&hid=110

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

Great thanks again Gerry.

I think the lightbulb just went on. I now remember the two groves in the shift shaft. I had assumed they were to set the oil seal depth. The top one was just a groove, but the bottom one is where the bushing and seal bottomed out (less a groove than a ridge). I'm guessing then that the circlip goes on the top groove in the shift shaft. Is that right?

If so I really have no need to remove the forward gear and cam, as hopfullying putting a a circlip will prevent the shift shaft from riding up and coming out of the cam splines.

Make sense?

Thanks again!

My only concern now is I may have ruined my drive shaft bearing in trying to remove it yesterday! So not sure if I will have to remove it now anyhow...but thanks for your insights!

 

[carholme]

Re: Removing Prop Shaft 9.8hp

You shouldn't have caused any damage to the bearing by tapping the case off of it but if there is any doubt, the bearings are not expensive:

http://www.ebay.com/itm/Quicksilver-Bearing-P-31-22756-2957-/190560376850

Did you happen to find the circlip in the LU anywhere?

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

I didn't come across the circlip yet. It could be in behind the forward gear with the cam, or perhaps it came out when previous owner had apart.

I tried yesterday to remove the bearing by pulling down on drive shaft and stopping case on a block of wood ( I like your method much better!). It just would not move. I got the bearing inner race torqued once or twice but it didn't seem to move the outer race. When spinning shaft it seemed less smooth, so that was my concern. Is there a collar or ridge below the bearing that seats it? May have to tap it back in to be sure I didn;t move it a bit or squew it any.

Tks again.

 

[carholme]

Re: Removing Prop Shaft 9.8hp

Just lightly tap it back in and then lock the d/s in a vice and with a wood block to protect the case, tap the case off the bearing, it may just be the length of the outer race which has caused it to **** a bit. I don't quite understand how you tried to remove it or what you mean by inner race torqued once or twice. Might as well get it out of there now and replace the bearing.

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

Here's my update Got the ds in a vice and tapped on the casing, but the shaft or the bearing would not budge. Had to stop as was afraid I would break something. Seems like the bearing is held in with a clip (I know the shaft is secured to bearing with clip) but I don;t see anything.

Going to put some heat on it and see if that helps. And I borrowed a slide hammer puller so hoping I can secure to shaft in some way to pull it straight out.

The only reason I need to get off is to get more enagement on my shift shaft splines with the cam. It only goes in 1/4 inch which is not enough to let the shift shaft seal drop low enough into the gear case.

Open to any other ideas.

tks.

 

[carholme]

Re: Removing Prop Shaft 9.8hp

I know this may sound stupid but you do have the pinion bolt removed and the pinion is off the lower part of the d/s?

Item 22 in this link:

http://www.crowleymarine.com/mercury-outboard/parts/453_16.cfm

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

Yes the pinion bold is removed, but it is still on the shaft. I was told it should fall off once the drive shaft starts to move. I can't really get in there pry it off, and worried about damaging it by doing so.

Does it need to come off first? If so any ideas on how to get it off?

 

[carholme]

Re: Removing Prop Shaft 9.8hp

The pinion on that one should be splined to the lower end of the d/s so it is just hanging up on the splines and yes it has to come off before the shaft will come out.

Just re-reading this:

"The only reason I need to get off is to get more enagement on my shift shaft splines with the cam. It only goes in 1/4 inch which is not enough to let the shift shaft seal drop low enough into the gear case."

Are you inserting the shift shaft with the long splines at the top or do you have it reversed?

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

Pretty certain I have it the right way around, as the groove for the circlip below the oilseal is in the right place. Otherwise it would be too high up.

How do you remove the pinion from drive shaft splines - not sure it will be able to be dropped down into casing as it is meshed with the forward gear. I was hoping it would drop off the splines but not the case. But also don't see why would be preventing the bearing or shaft from coming out, as it should come out with the drive shaft through the bearing opening? Correct?

 

[carholme]

Re: Removing Prop Shaft 9.8hp

Well as I can't see the thing, you are going to have to get some PB Blaster in above the pinion and let it soak into those splines overnight and give the gearcase a good rap tomorrow. You can hit it pretty hard as long as you have a 2x4 across the gearcase. Pour the blaster in there and give it a good soak. In a good world the pinion should come off the splines as the gearcase is being tapped off the driveshaft.

If you think the shift shaft is in correctly it is probably too high as it is not engaged in the cam allowing it to drop down further.

Gerry

 

[db21]

Re: Removing Prop Shaft 9.8hp

Ok going to tackle this this weekend, however one additional question. I still can't seem to get the pinion gear off (bolt is removed) and everything has been nicley lubed up. However from the drawings I'm trying to determine if there is actually any reason the pinion needs to come off to remove the drive shaft? Will the pinion gear not simply come out with the bearing and shaft up from the top, or is there a collar that prevents it from coming up. In which case yes hopfully when I pull on the shaft it should slip off. It doesn't look like there is any snap ring or anything keeping bearing in, just the snap ring to keep the shaft from moving too far down. Am I missing something, or can I just put some heat to the gear case and hope to pull the driveshaft, bearing and pinion all out together?

tks.