[Rhodes22-list] Motor lift “bearings”?

[Olivier Hecht]

Thanks Roger. That is a lot different and looks like an upgrade!  I wish
I’d taken more pictures before leaving the boat at the yard again...I can
do that the next time I’m there. Basically though, there are four round
protrusions on the movable carriage in the mount at the four corners of
that carriage. Those are the parts that fit inside the plastic bearings I’m
trying to replace. BTW, those protrusions themselves look pretty work
themselves so upgrading the carriage might be the best long-term idea.
Raising and lowering the motor has always been very tough with this design.
One of the many reasons I’m so hesitant to use the motor! Olivier

On Sun, Jun 28, 2020 at 11:05 AM ROGER PIHLAJA <roger_pihlaja at msn.com>
wrote:

> Olivier,
>
> I’ve attached a close-up photo of the linear bearing on my GBI motor
> mount.  Note that it doesn’t seem at all like yours.  My linear bearings
> are T-shaped pieces of glass-filled PTFE that ride in 6061 T6 Aluminum
> C-Channels.  This design of linear bearing has a huge bearing surface area,
> so the wear rate is minimal.  The design is self flushing to keep abrasive
> debris out of the bearing.  Plus, the bearings can be easily swapped out
> W/O disassembling the whole motor mount when replacement is required after
> many, many service hours.  I don’t know when GBI changed the design; but,
> it might be helpful if you provided a few more photos of your motor mount.
>
> Also, it might be helpful if you make a few measurements of the
> ID/OD/Length of your bearings.  They might be standard plastic pipe sizes
> and easily sourced from Grainger, McMaster-Carr, or United States Plastics
> Corp.
>
> Roger Pihlaja
> S/V Dynamic Equilibrium
>
> [cid:image003.jpg at 01D64D3C.17C68130]
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> From: Olivier Hecht<mailto:oehecht at gmail.com>
> Sent: Saturday, June 27, 2020 9:01 PM
> To: The Rhodes 22 Email List<mailto:rhodes22-list at rhodes22.org>
> Subject: [Rhodes22-list] Motor lift “bearings”?
>
> Did 50 miles on Fretless from 3 pm Friday to 6 pm today, with a nice break
> at a marina from 7 pm to 8 am!
>
> An unpleasant part of the experience was dealing with the motor lift
> getting crooked in the tracks because two of the four plastic “bearings”
> the mount rides on were worn out/missing. See pics. I sent a note to Stan
> but also wanted to ask here if anyone has replaced these. Any tips on
> replacing them without dismounting the motor if that’s possible?  The side
> tracks appear to come off and I was able to retrieve one of the bearings
> that was loose in the track after parking the  it on its trailer. Getting
> new ones in will probably be harder though...
>
> Thanks. Olivier
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