Upper shift shaft bushing r and r, and separate cooling issue

Pruno

Seaman
Joined
Oct 9, 2019
Messages
62
While working a separate with the shift interrupter not engaging as it should, I pulled the drive off to replace the shift lever and found water in the shift pocket. So it’s time to change out the bushings. It’s an Alpha one Gen one (I can get S/N in the morning if it matters). If memory serves me correctly, I thought I read on here that it is possible and recommended to change it over to the gen II style? Or am I misremembering that to something else? Any words of wisdom to press the old ones out and new ones in? I think merc has a special tool for that, but my tool box does not. Also, the parts diagram makes it hard to tell if there should be a washer and/or other oil seal in there. Mine had nothing else as I pulled it apart - just the shift shaft and shift lever.

Twice now I’ve had an issue of zero water coming out of exhaust or relief ports while running on muffs. The first time I disassembled all hoses transom to to engine and to exhaust to try and narrow down where the issue lay. Was about to pull and split drive and I thought I’d try running engine one more time. Lo and behold Water! Had it on the lake all last week no temp issues. Fast forward to today, running engine on trailer and no water - zero, the intake side of hose was very warm all the way down to the bell housing. Already have the drive off, gonna split it tomorrow and check impeller. I have another hose I’ll put on too. I failed to measure the hose that I put on this spring worried there might be a kink. I can feel what seems to be the beginning of a kink but not a fold. Where else to check? I would think if the impeller went tango uniform that would be a hard fail, but I’ll check anyway.

Matt
 

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Rick Stephens

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I made a tool out of a fairly long 3/8th, I think , bolt, a nut and a washer to drive the new one in square. Worked fine going up through the bottom. Driving it out doesn't need to be square, so a longish drive works.

And yes, you want the new style which uses a lot bigger seals and works much better.

I had that happen on muffs once, last year. No idea why. Killed the motor after a minute or so. Checked everything, fired up again and water flowed in 20 seconds or so. I still have no idea how come.

Rick
 

Scott06

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Apr 20, 2014
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I think the water flow issue on the muffs is related to placement of the muffs On the drive.i have one with rectangular ears that is very prone to block water flow i to the water pick up ports
 

Pruno

Seaman
Joined
Oct 9, 2019
Messages
62
Thanks for the replies.
Rick - is it just out with the old bushings and in with the new? Or do I need other parts, maybe the newer shift shaft too?

Scott - I have the rectangular ones too. I thought the position could have been an issue. I had them a little to far back so moved them forward,still nothing. Maybe moved them too far.
 

Rick Stephens

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Thanks for the replies.
Rick - is it just out with the old bushings and in with the new? Or do I need other parts, maybe the newer shift shaft too?

Yes, drive out the old one, drive in the new one from the bottom. The hard part is getting the lever off the top of the shift shaft. Make sure the screwdriver you use is exactly the right one and you probably need some heat as they are usually red locktite in place.
 

Pruno

Seaman
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Oct 9, 2019
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Eh, I should have been more clear with my question... out with the old style and in with the new style?
shift lever/shaft is already off:)
 

Rick Stephens

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Eh, I should have been more clear with my question... out with the old style and in with the new style?
shift lever/shaft is already off:)

I thought I was clear, hehe. Answer is yes, it is very simple. Drive old out, drive new in.
 

Pruno

Seaman
Joined
Oct 9, 2019
Messages
62
Got the parts in but its not adding up. The new bushings are .75" and the hole they go into are ~.65".
Trying to dig in it looks as though there may have been a change at some point on the gen one?
my drive - 0C556682
the part I ordered was Sierra 18-3760. The other brushing kit 18-2622 doesn't look like it matches up with my bell housing either.
am I out to lunch on this?
 
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