Re: [omc-boats] Suggestion for Ball Drive Parts on 1969 or 1970 120

I have the press on type unfortunately.
Is paradise marine Sterndrive.com? They look to have
a good selection of parts. Hopefully they are good to
deal with.
Thanks for the good info--It does not look to be too
bad, but I have not worked on this early of a stern
drive before--doesn't look any harder than an Alfa
Romeo...

--- Ethan Brodsky <brodskye@...> wrote:

> On Mon, 15 May 2006, A Mark wrote:
> > The ball gear has a couple of the teeth shaved off
> > (pointed) from what looks to be someone 'trimming'
> the
> > lower unit. Since the boat has not been in the
> water
> > for at least 5 years, I want to replace the ball
> > drive,
>
> Does your drive use the ball gear that is retained
> by a nut or the one that
> is pressed onto the shaft? The latter is much
> harder to find - that's what
> was on my 1970 boat. I've been variously told that
> the Sierra kits have
> the nut-gears that only fit 71/72 or newer. I
> watched ebay for a couple
> months (and emailed everyone I found who was selling
> older OMC parts)
> before finding a press-fit gear. If you want, email
> me and I can send you
> a few likely contacts to try.
>
> Disassembly is fairly simple - you have to remove
> the outdrive, take off
> the retainer plates on each side (three bolts on the
> intermediate housing,
> four on the outdrive), and then pull the shafts. If
> you're just replacing
> the ball gear and not the entire shaft, you'll need
> a fairly large press
> and/or a bearing puller to get them apart.
>
> You might as well replace the rear intermediate
> housing bearing as this
> time as well - mine was destroyed and I think they
> are inadequately
> lubricated (since there's no easy way to check
> intermediate housing oil
> level). A new bearing (206K C3) should be available
> from a local
> industrial supply shop. I bought replacement shims
> (no gaskets used) from
> Paradise Marine in WA. Some of the o-rings are
> somewhat hard to find, but
> I found close matches (#140 was one) at a local
> place - if I did it again
> I'd probably spend the few dollars and buy them from
> Paradise again.
>
> I ended up spending $60 for the intermediate side
> ball gear (and shaft),
> $55 for the outdrive ball gear (reused the old shaft
> - important for
> maintaining tolerances without reshimming), $25 for
> shims, $15 for a
> bearing, and another $10 for various o-rings and
> snap-rings. It took me a
> few afternoons to do all the work (I also replaced
> the water pump and some
> seals), but you'll probably be quicker.
>
> Best wishes,
>
>
> Ethan
>
> --
> <A HREF="http://www.engr.wisc.edu/~brodskye/"> Ethan
> Brodsky </A>
> UW FutureCar Team Paradigm: Two-Year FutureCar
> Challenge Winner
> UW-Madison Clean Snowmobile Team: Winner of the 2004
> SAE CSC
> -----
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Received on Monday, 15 May 2006