[Rhodes22-list] Motor lift “bearings”?

Wed Jul 1 16:10:12 EDT 2020

Olivier,
Getting in touch with Stan can be a challenge at times.  Try stan at generalboats.com.

I expect the new trolley uses the 'linear bearings'.  It seems to be the way Stan has gone lately.  The slide pieces are likely made from Starboard or, as in Roger's case, PTFE.  The material can be cut and shaped as needed to fit. - rob

________________________________
From: Rhodes22-list <rhodes22-list-bounces at rhodes22.org> on behalf of Olivier Hecht <oehecht at gmail.com>
Sent: Wednesday, July 1, 2020 3:50 PM
To: The Rhodes 22 Email List <rhodes22-list at rhodes22.org>
Subject: Re: [Rhodes22-list] Motor lift “bearings”?

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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