Alpha one, gear housing (prop shaft)

[chizwizdiz]

While changing the impellar, I noticed that a seal was leaking (item number 75, I think)
http://www.mercruiserparts.com/IMAGES/COMMON/30071.png

I glanced through the service manual and didn't see exactly what I was looking for. Can the old seal simply be removed and the new one installed without any special tools?

If so, is this the correct seal?

http://www.iboats.com/Oil-Seal-Sierra/dm/view_id.171682

Thanks!

 

[r.j.dawg]

Re: Alpha one, gear housing (prop shaft)

The oil seal in the iboats link you provided is for an outboard motor not an Alpha. Do you have an Alpha One or and Alpha Gen II?

 

[chizwizdiz]

Re: Alpha one, gear housing (prop shaft)

The oil seal in the iboats link you provided is for an outboard motor not an Alpha. Do you have an Alpha One or and Alpha Gen II?

Roger that, alpha one, gen one.

 

[r.j.dawg]

Re: Alpha one, gear housing (prop shaft)

Heres the link for that drive. http://www.iboats.com/Mercruiser-MR...0785481--session_id.742825115--view_id.272969

 

[chizwizdiz]

Re: Alpha one, gear housing (prop shaft)

I attempted to cross reference the part number from here http://www.mercruiserparts.com/Show...=120&bdesc=GEAR+HOUSING(PROPELLER+SHAFT)+-+MR

(item 75)

 

[r.j.dawg]

Re: Alpha one, gear housing (prop shaft)

Well I'll be darned. It's the same part number. Seems to be a muti application seal.

 

[chizwizdiz]

Re: Alpha one, gear housing (prop shaft)

Well I'll be darned. It's the same part number. Seems to be a muti application seal.

I just noticed as well, I appreciate the help. As for the installation, is it just a remove and install? No special tools?

 

[wellcraft-classic210]

Re: Alpha one, gear housing (prop shaft)

Their are actually 2 seals ( 1 for pressure the other for vaccum ) and its best to pull the bearing carrier to perform this if you are going to change both. The Special tools typically required are Bearing carrier reatainer nut wrench, bearing carrier puller and a pressure tester setup. If the prop shaft is scored where the seal contacts ( not uncommon) that should be adressed as well.

If you use the procedure on merc stuff .com to pull the bearing carrier you can avoid the need for a puller. I was able to polish my prop shaft as it was only lightly scored.

A good manual is very helpful if you want to attempt this yourself.

With all that said it may be quite possible to change the outer seal with a teardown but I have never tried. You may b able to see the outer shaft surface before the teardown as well as their tends to be some end play in those. This of course may not be the best repair but could buy you some time and or save some $. A pressure test would be crucial.

 

[chizwizdiz]

Re: Alpha one, gear housing (prop shaft)

Their are actually 2 seals ( 1 for pressure the other for vaccum ) and its best to pull the bearing carrier to perform this if you are going to change both. The Special tools typically required are Bearing carrier reatainer nut wrench, bearing carrier puller and a pressure tester setup. If the prop shaft is scored where the seal contacts ( not uncommon) that should be adressed as well.

If you use the procedure on merc stuff .com to pull the bearing carrier you can avoid the need for a puller. I was able to polish my prop shaft as it was only lightly scored.

A good manual is very helpful if you want to attempt this yourself.

With all that said it may be quite possible to change the outer seal with a teardown but I have never tried. You may b able to see the outer shaft surface before the teardown as well as their tends to be some end play in those. This of course may not be the best repair but could buy you some time and or save some $. A pressure test would be crucial.

Appreciate the help, I guess I need to go see what I'm getting myself into.