[Rhodes22-list] Motor lift “bearings”?

Wed Jul 1 15:50:59 EDT 2020

Thanks Rob. So far I’ve been unable to reach Stan by email or phone...I get
a “Google phone disconnected” message for the latter. I’d like to replace
the round bearings I have in the short term at least as I consider getting
a new “trolley”. That part is available on the parts site for $600 but I’m
unsure if it has the linear bearings and, if so, if it would be compatible
with the rails I already have.

Does anyone know what these types of plastic bearings might be made of?  It
feels like a fairly hard (and brittle) type of plastic. Maybe it’s a common
part from something else?

On Wed, Jul 1, 2020 at 2:46 PM Lowe, Rob <rlowe at vt.edu> wrote:

> Since we are talking about motor mounts and bearings, here is what mine
> look like.  Also a linear bearing that rides in a C channel. - rob
>
>
> ________________________________
> From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of Ric
> Stott <ric at stottarchitecture.com>
> Sent: Monday, June 29, 2020 7:09 AM
> To: The Rhodes 22 Email List <rhodes22-list at rhodes22.org>
> Subject: Re: [Rhodes22-list] Motor lift “bearings”?
>
> Oliver and Roger
> A few more pics would be great.
> Dadventure motor mount report.
> I use a Mac and Nabble kicks off my attachments but if I could - I would
> show you my original mount broken which left my Yamaha 8 underwater.
> I bought a West Marine mount to use until I can rebuild and perhaps
> re-engineer my GB system.
> I also switched out the Yamaha (to receive a new carb, new starter
> alternator, wiring harness and new water pump impeller) for an old 2 cycle
> Merc I have. I don’t like the 16” throw west marine parallelogram mount
> even though it eliminates the need to tilt the motor.
> With the traveler in place, dealing with the motor is a PITA. It’s easy to
> remove, but not if you happen to be sailing, which of course it what you
> are supposed to be doing.
> I’ll let y’all know what happens next.
> Ric
> Dadventure
> HBNY
> Sent from my iPhone
>
> >> On Jun 29, 2020, at 1:34 AM, Mary Lou Troy <mtroy at atlanticbb.net>
> wrote:
> > Hi Olivier,
> > I'm trying to remember the details of exactly how the mount worked. We
> didn't pay it much attention though we may have added a stop at the bottom.
> I know the design kept evolving after we bought the boat in 1998 and as the
> boat was a 1991, it may have been a design from a previous year.
> >
> > I wonder how long that plastic had been fatigued and if that had
> something to do with your difficulties with the mount?  I don't remember a
> whole lot of difficulty raising and lowering the motor and I'm not the
> strongest or most athletic sort. In spite of that, I did most of the
> raising and lowering. it did take moving close to the mount and raising it
> hand over hand. I guess it would have been more problematic if we were not
> always sailing with two people but it almost always went quickly. It did
> sometime take a nudge on the top of the motor to get it going down.
> >
> > Hope you find a quick fix and glad you are getting out a lot.
> >
> > Mary Lou
> >
> >> On 6/28/2020 1:16 PM, Olivier Hecht wrote:
> >> 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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