[Rhodes22-list] Motor Mount

Mon Mar 29 14:41:53 EDT 2021

Hi folks,

I'm responding to an older post by Roger about his experience using an
off-the-shelf motor mount with the goal of seeing if others can share their
experiences with a non-GB outboard mounting solution.

My R22 has a Saildrive and the manufacturer is out of business. I suspect
the bellows may be leaking when the stern is heavily loaded, but even if
that's not the case I want to plan for an eventual replacement of that
engine. I'm convinced that if I don't take proactive steps, some part of
that engine/drive will fail mid-season and I won't be able to get parts for
it. As far as I know no one is currently making a Saildrive with an
outboard head on it. There are a few with small diesels like Yanmar and
Beta. I installed a Beta 16 in my 30' Nimble but I'm not interested in
trying to squeeze a diesel into the lazarette of an R22. So I plan to
replace the saildrive with an outboard mounted on the stern.

I reached out to Stan about bringing my boat down next fall to have a GB
lift system installed but he's apparently got too much on his plate right
now. In searching some of the email traffic on this topic I came up with
Roger's post below.

My question: has anyone had success with an off-the-shelf solution? I don't
plan to try to fabricate my own sliding motor mount so I need to find
something I can buy and install. Any suggestions are welcome.

Thanks,

Mark
Boston, MA

2000 R22 *Luna Mia*
1987 Nimble 30 *Under agreement*
1982 Com-Pac 16 *For Sale*

On Wed, Jun 3, 2020 at 7:15 AM ROGER PIHLAJA <roger_pihlaja at msn.com> wrote:

> Hi Ric,
>
> S/V Dynamic Equilibrium originally had a parallelogram linkage style motor
> mount.  It worked OK.  But, before you buy, consider two major
> disadvantages of this style motor mount.
>
> One, the parallelogram linkage has a number of heavily loaded pivot
> points.  On my motor mount, these pivot points were made from some sort of
> riveted bushings.  They had no provision for lubrication and so had a
> tendency to wear and get sloppy.  The GBI motor mount has no such built-in
> wear points.  This pivot wear was the primary reason I decided to replace
> my motor mount back in 2010.  But, replace it with what?
>
> Which brings me to disadvantage #2.  By design, the parallelogram linkage
> moves the motor out away from the transom as well as down.  So what you may
> ask?  Well, at least on S/V Dynamic Equilibrium, this outward movement
> ended up putting the motor’s lower unit right in the bottom of the trough
> of the stern wave.  i.e. The stern wave’s trough caused the lower unit to
> be less submerged than it could have been if the lower unit were closer to
> the transom.  This made the outboard more susceptible to cavitation in
> heavy weather.  Note, that I also have an extra long shaft Honda outboard
> (25”) to help with this same issue.  The GBI motor mount allows the lower
> unit to be as deep as possible and as close as possible to the transom as
> any motor mount on the market today.  The GBI motor mount also allows the
> vertical position of the motor to be adjusted.  i.e. You can adjust it to
> be very deep to prevent cavitation when motor sailing on port tack and then
> raise it up to prevent the motor’s upper unit from taking on water on
> starboard tack.  In the picture of S/V Dynamic Equilibrium’s stern that you
> have been referencing, the motor mount is shown in the fully lowered
> position.  Note how far below the waterline stripe the motor’s lower unit
> is.  In heavy conditions, often the only way to make progress to windward
> is to motor sail.  The combination of a GBI motor mount and an extra long
> shaft outboard, gives S/V Dynamic Equilibrium significantly more heavy
> weather capability vs. when it had the old parallelogram style motor
> mount.  Another GBI motor mount advantage is the built-in 6:1 block and
> tackle, which makes raising and lowering the motor almost effortless.  The
> GBI motor mount is a well engineered, well built piece of gear.
>
> Stan, you can send my sales commission to my home address!  😉
>
> Roger Pihlaja
> S/V Dynamic Equilibrium
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> From: Richard Stott<mailto:ric at stottarchitecture.com>
> Sent: Tuesday, June 2, 2020 6:01 PM
> To: The Rhodes 22 Email List<mailto:rhodes22-list at rhodes22.org>
> Subject: Re: [Rhodes22-list] Motor Mount
>
> Hey Mike
> Thanks for the research and the drawings.
> The lift on Dynamic Equilibrium is what I have seen and remembered.
> I have tried to buy this from Stan, but he told me I’d have to bring the
> boat to Edmonton to have it installed.
> Not sure why.
> It looks robust and permanent, but it also looks overly large and
> cumbersome for operating the motor with the tiller.
> I’m thinking that this West marinate bracket will do the trick.
> It has a 16” vertical trail which allows the motor to lift all the way
> above the waterline without tilting it and all the gear moves with the
> motor so there is nothing in the way of steering or reaching controls.
> Has anyone chosen this ‘dark side’?
> Any reports on after market /non-GB mounts?
> Thanks Ric
>
>
>
>
> Richard Stott, AIA, LEED AP
> www.stottarchitecture.com<http://www.stottarchitecture.com>
> Office  631-283-1777
> Cell            516-965-3164
>
>
>
>
>
> > On Jun 2, 2020, at 5:40 PM, Michael D. Weisner <mweisner at ebsmed.com>
> wrote:
> >
> > Ric,
> >
> > I'm not sure what you are looking to build in the way of a motor mount.
> >
> > I searched the archives and found a photo of an GB design on Roger's
> Rhodes from a 2019 post at:
> >
> http://rhodes22.org/pipermail/rhodes22-list/attachments/20190526/bf33e9c5/attachment.jpg
> > and
> >
> http://rhodes22.org/pipermail/rhodes22-list/attachments/20190526/97a8a159/attachment.jpeg
> > Maybe Stan can ship you one.
> >
> > Way back in 2007, Jay Bulfer nearly lost his motor while trying to beat
> out a storm. s/v Just Bent's engine mount had failed. He provided the
> attached drawing and reconstructed the mount using stainless steel (he is a
> metal fabricator at jbtek.com).
> >
> > My GB motor mount looks a lot like yours with the exception of the wood
> (see photos added at the end of the message).
> >
> > Mike
> > s/v Wind Lass ('91)
> > Nissequogue River, NY
> > I’d rather be sailing :~)
> >
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