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

I've purchased parts from this outfit, been pleased with everything I've
ordered.

http://www.sterndrive.info/index.html

----- Original Message -----
From: "A Mark" <tinman694@...>
To: <omc-boats@...>
Sent: Monday, May 15, 2006 12:06 PM
Subject: 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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>>
>
>
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Received on Monday, 15 May 2006