Marine Electric Motors ?
James W. Creighton
We are looking for a north American distributor for a marine electric
motor capable of moving an 11,000lb flat bottomed sailing dory. Does anyone have
a name and address they could pass along ?
Thanks, Jim Creighton
jcrei...@CompuServe.com
--
Peggie Hall
James W. Creighton wrote:
>
> We are looking for a north American distributor for a marine electric
> motor capable of moving an 11,000lb flat bottomed sailing dory. Does anyone have
> a name and address they could pass along ?
I may be showing my ignorance...but WHY? Seems to me the battery power
required would make it totally impractical, with no way to recharge but
solar or a wind generator...neither of which--since they rely on
nature--are all that reliable. Mind enlightening me?
Peggie Hall/Peal Products
Specializing in marine toilet systems since 1987
guy noir
Peggie Hall wrote:
> I may be showing my ignorance...but WHY? Seems to me the battery power
> required would make it totally impractical, with no way to recharge but
> solar or a wind generator...neither of which--since they rely on
> nature--are all that reliable. Mind enlightening me?
>
> Peggie Hall/Peal Products
> Specializing in marine toilet systems since 1987
I was on an 8000 ton electric boat. Using steam generators to power
electric ships motors was once quite common. I met a man here in
Portland OR who's building an electrically powered boat using a forklift
motor.
John
guy noir
Peggie Hall
8000 TONS, yes...there's room for such things as steam generators...but
11000 lbs is less than my 32' powerboat weighs...How can it be practical
on anything that small?
(I'm not being argumentative...I'm trying to learn something!)
Peggie
guy noir
> on anything that small?
>
> (I'm not being argumentative...I'm trying to learn something!)
>
> Peggie
I've also seen small scuba divers electric sleds (James Bond type), and
there was a solar powered kayak on display (and underway) at the Wooden
Boat Festival in Port Townsend, Wa. this year. The forklift powered
boat was probably about 4000lb, and originally designed as a steam
launch. Size doesn't matter.
John
Larry Feeney
In article <65muu1$k...@bgtnsc03.worldnet.att.net>,
Peggie Hall <peg...@worldnet.att.net> wrote:
>James W. Creighton wrote:
>>
>> We are looking for a north American distributor for a marine electric
>> motor capable of moving an 11,000lb flat bottomed sailing dory. Does anyone
have
>> a name and address they could pass along ?
>
>required would make it totally impractical, with no way to recharge but
>solar or a wind generator...neither of which--since they rely on
>nature--are all that reliable. Mind enlightening me?
>
>Peggie Hall/Peal Products
"Why?", Peggie....
I’m currently building a 23’ fantail launch which I will power with an
electric system. Here are a few reasons:
1. Silence. Ever spent a 10 or 12 hour day motoring with a 2 cylinder diesel
pounding away under your feet? Electric motors are virtually silent when
properly installed.
2. Cost. The cost of my electric system, including battery bank, will be
less than the cost of the alternate small diesel by more than a thousand
dollars. Those batteries also represent my major "fuel" costs for several
years of operation.
3. Environmental issues. Personally, I don’t believe electric power is the
panacea some members of the environmental movement seem to claim but for those
of us who don’t care for the smell of fossil fuels and the mess associated
with them, electric power is "clean".
4. Efficiency #1. Much of the energy consumed by an internal combustion
engine is wasted by the inefficiencies of the engine itself. A DC electric
motor is about 80% efficient in terms of its thermal efficiency; by comparison
a gasoline engine rates 25.8% at its most efficient speed and a diesel about
33%. That’s why a much smaller DC motor can produce the same "power" as a
larger diesel or gas engine.
5. Efficiency #2. Many sailers want to spend most of their time sailing and
use their engines for relatively short periods of time, maneuvering in and out
of a dock. This isn’t very good for a diesel or gasoline engine and yet it is
a very nice match for an electric motor which will not require large battery
banks and will be quickly recharged back at the dock. Remember, most
sailboats already carry two deep cycle batteries, an onboard charger and an
electric motor—the starting motor.
6. Efficiency #3. An electric system suitable for a displacement hull and a
reasonable cruising range will take up considerably less space and somewhat
less weight than the equivalent fossil fuel system with its engine, tankage,
plumbing, etc. The batteries (say a bank of 6 or 8) can often provide useful
ballast as well.
7. Efficiency #4. A displacement boat up to the 25’ range can easily cruise
for an entire day under power without even approaching the depletion of an 8
battery bank. Many people will trailer their boats or tie up at a dock with
shore power at the end of the day. A little "spare change" later, they’ll be
ready to do it again the following day.
As to the poster’s original question, systems suitable for larger boats are
available from ELCO (914-691-3777) and Beckman, Ltd. (401-783-1859). A little
research can help design and spec a system of your own at considerably less
cost. The Electric Boat Association of the Americas recently published a very
useful listing of sources. (see http://www.electricboat.com/)
Larry Feeney
Bellingham, WA
John Howell
Not practical...
Leaves no room for the necessaties....by the time you fill the boat with batteries then out goes the AC...the Onan or whatever....and getting on the plane becomes a distant memory
John
In article <65nu6o$2...@bgtnsc03.worldnet.att.net>,
Peggie Hall <peg...@worldnet.att.net> wrote:
>guy noir wrote:
>>
>> Peggie Hall wrote:
>>
>> > I may be showing my ignorance...but WHY? Seems to me the battery power
>> > required would make it totally impractical, with no way to recharge but
>> > solar or a wind generator...neither of which--since they rely on
>> > nature--are all that reliable. Mind enlightening me?
>> >
>> > Peggie Hall/Peal Products
>> > Specializing in marine toilet systems since 1987
>>
>> I was on an 8000 ton electric boat. Using steam generators to power
>> electric ships motors was once quite common. I met a man here in
>> Portland OR who's building an electrically powered boat using a forklift
>> motor.
>
>8000 TONS, yes...there's room for such things as steam generators...but
>11000 lbs is less than my 32' powerboat weighs...How can it be practical
Peggie Hall
John, I doubt that planing is a consideration on a sailboat. :-) But
power resources and the ability to renew them are. Which is the basis of
my wondering how electric propulsion could be practical on a sailboat
that can't be any bigger than 30-35'.
Peggie
Russ Schnorr
<HTML>
I've seen in some elect car applications where they've implemented regenerative
braking. Could this possibly be implemented in a sailboat ???
<BR>
<P>Larry Feeney wrote:
<BLOCKQUOTE TYPE=CITE>In article <65muu1$k...@bgtnsc03.worldnet.att.net>,
<BR> Peggie Hall <peg...@worldnet.att.net> wrote:
<BR>>James W. Creighton wrote:
<BR>>>
<BR>>> We are looking for a north American distributor for a marine electric
<BR>>> motor capable of moving an 11,000lb flat bottomed sailing dory.
Does anyone
<BR>have
<BR>>> a name and address they could pass along ?
<BR>>
<BR>>I may be showing my ignorance...but WHY? Seems to me the battery power
<BR>>required would make it totally impractical, with no way to recharge
but
<BR>>solar or a wind generator...neither of which--since they rely on
<BR>>nature--are all that reliable. Mind enlightening me?
<BR>>
<BR>>Peggie Hall/Peal Products
<P>"Why?", Peggie....
<P>I’m currently building a 23’ fantail launch which I will power with
an
<BR>electric system. Here are a few reasons:
<P>1. Silence. Ever spent a 10 or 12 hour day motoring with
a 2 cylinder diesel
<BR>pounding away under your feet? Electric motors are virtually
silent when
<BR>properly installed.
<BR>2. Cost. The cost of my electric system, including battery
bank, will be
<BR>less than the cost of the alternate small diesel by more than a thousand
<BR>dollars. Those batteries also represent my major "fuel" costs
for several
<BR>years of operation.
<BR>3. Environmental issues. Personally, I don’t believe electric
power is the
<BR>panacea some members of the environmental movement seem to claim but
for those
<BR>of us who don’t care for the smell of fossil fuels and the mess associated
<BR>with them, electric power is "clean".
<BR>4. Efficiency #1. Much of the energy consumed by an internal
combustion
<BR>engine is wasted by the inefficiencies of the engine itself. A DC electric
<BR>motor is about 80% efficient in terms of its thermal efficiency; by
comparison
<BR>a gasoline engine rates 25.8% at its most efficient speed and a diesel
about
<BR>33%. That’s why a much smaller DC motor can produce the same "power"
as a
<BR>larger diesel or gas engine.
<BR>5. Efficiency #2. Many sailers want to spend most of their
time sailing and
<BR>use their engines for relatively short periods of time, maneuvering
in and out
<BR>of a dock. This isn’t very good for a diesel or gasoline engine
and yet it is
<BR>a very nice match for an electric motor which will not require large
battery
<BR>banks and will be quickly recharged back at the dock. Remember,
most
<BR>sailboats already carry two deep cycle batteries, an onboard charger
and an
<BR>electric motor—the starting motor.
<BR>6. Efficiency #3. An electric system suitable for a displacement
hull and a
<BR>reasonable cruising range will take up considerably less space and
somewhat
<BR>less weight than the equivalent fossil fuel system with its engine,
tankage,
<BR>plumbing, etc. The batteries (say a bank of 6 or 8) can often
provide useful
<BR>ballast as well.
<BR>7. Efficiency #4. A displacement boat up to the 25’ range
can easily cruise
<BR>for an entire day under power without even approaching the depletion
of an 8
<BR>battery bank. Many people will trailer their boats or tie up
at a dock with
<BR>shore power at the end of the day. A little "spare change" later, they’ll
be
<BR>ready to do it again the following day.
<P>As to the poster’s original question, systems suitable for larger boats
are
<BR>available from ELCO (914-691-3777) and Beckman, Ltd. (401-783-1859).
A little
<BR>research can help design and spec a system of your own at considerably
less
<BR>cost. The Electric Boat Association of the Americas recently
published a very
<BR>useful listing of sources. (see <A HREF="http://www.electricboat.com/">http://www.electricboat.com/</A>)
<P>Larry Feeney
<BR>Bellingham, WA</BLOCKQUOTE>
</HTML>
Peggie Hall
Thanks for a very complete answer! Now that I know it's a launch that
stays close to an AC source for recharging, it makes a lot of sense. I
just couldn't figure out how it could for any vessel going offshore.
Have you looked at golf cart batteries?
Peggie
Russ Schnorr wrote:
>
> I've seen in some elect car applications where they've implemented
> regenerative braking. Could this possibly be implemented in a sailboat
> ???
>
>
> Larry Feeney wrote:
>
> In article <65muu1$k...@bgtnsc03.worldnet.att.net>,
> Peggie Hall <peg...@worldnet.att.net> wrote:
> >James W. Creighton wrote:
> >>
> >> We are looking for a north American distributor for a
> marine electric
> >> motor capable of moving an 11,000lb flat bottomed sailing
> dory. Does anyone
> have
> >> a name and address they could pass along ?
> >
> >I may be showing my ignorance...but WHY? Seems to me the
> battery power
> >required would make it totally impractical, with no way to
> recharge but
> >solar or a wind generator...neither of which--since they
> rely on
> >nature--are all that reliable. Mind enlightening me?
> >
> >Peggie Hall/Peal Products
>
> "Why?", Peggie....
>
> I’m currently building a 23’ fantail launch which I will
> power with an
> electric system. Here are a few reasons:
>
> 1. Silence. Ever spent a 10 or 12 hour day motoring with a
> 2 cylinder diesel
> pounding away under your feet? Electric motors are
> virtually silent when
> properly installed.
> 2. Cost. The cost of my electric system, including battery
> bank, will be
> less than the cost of the alternate small diesel by more
> than a thousand
> dollars. Those batteries also represent my major "fuel"
> costs for several
> years of operation.
> 3. Environmental issues. Personally, I don’t believe
> electric power is the
> panacea some members of the environmental movement seem to
> claim but for those
> of us who don’t care for the smell of fossil fuels and the
> mess associated
> with them, electric power is "clean".
> 4. Efficiency #1. Much of the energy consumed by an
> internal combustion
> engine is wasted by the inefficiencies of the engine itself.
> A DC electric
> motor is about 80% efficient in terms of its thermal
> efficiency; by comparison
> a gasoline engine rates 25.8% at its most efficient speed
> and a diesel about
> 33%. That’s why a much smaller DC motor can produce the same
> "power" as a
> larger diesel or gas engine.
> 5. Efficiency #2. Many sailers want to spend most of their
> time sailing and
> use their engines for relatively short periods of time,
> maneuvering in and out
> of a dock. This isn’t very good for a diesel or gasoline
> engine and yet it is
> a very nice match for an electric motor which will not
> require large battery
> banks and will be quickly recharged back at the dock.
> Remember, most
> sailboats already carry two deep cycle batteries, an onboard
> charger and an
> electric motor—the starting motor.
> 6. Efficiency #3. An electric system suitable for a
> displacement hull and a
> reasonable cruising range will take up considerably less
> space and somewhat
> less weight than the equivalent fossil fuel system with its
> engine, tankage,
> plumbing, etc. The batteries (say a bank of 6 or 8) can
> often provide useful
> ballast as well.
> 7. Efficiency #4. A displacement boat up to the 25’ range
> can easily cruise
> for an entire day under power without even approaching the
> depletion of an 8
> battery bank. Many people will trailer their boats or tie
> up at a dock with
> shore power at the end of the day. A little "spare change"
> later, they’ll be
> ready to do it again the following day.
>
> As to the poster’s original question, systems suitable for
> larger boats are
> available from ELCO (914-691-3777) and Beckman, Ltd.
> (401-783-1859). A little
> research can help design and spec a system of your own at
> considerably less
> cost. The Electric Boat Association of the Americas
> recently published a very
Rev. Karin Conover-Lewis
Peggie Hall wrote in message <65pes2$d...@bgtnsc02.worldnet.att.net>...
>John, I doubt that planing is a consideration on a sailboat. :-) But
>power resources and the ability to renew them are. Which is the basis of
>my wondering how electric propulsion could be practical on a sailboat
>that can't be any bigger than 30-35'.
>
>Peggie
>
In my opinion, electric isn't terribly practical for *powerboats* in small
sizes - although there are wonderful electric harbour cruisers being built
that could almost make me eat those words. Their primary advantage, as
others have mentioned, is that they are so quiet, and have no emissions of
their own. With sailboats, however, where mechanical power is strictly of an
auxiliary nature, diesel-electric can be extremely practical. Most sailboats
these days, particularly cruisers, are loaded to the gunwales with
electrical equipment which requires a large battery bank and genset to begin
with. A somewhat larger genset (eight - twelve kw as opposed to four -
seven) and battery bank will provide the power necessary to run a 25 hp
electric for a several hours. And since the batteries don't care where the
electricity comes from, they can also be charged (albeit slowly) by wind
generators and solar panels, as well as dock outlets.
Granted, a diesel inboard can run almost forever, given enough fuel, but
this is for *auxiliary* power - only for back-up and maneuvering. So rather
than having both a genset and an inboard diesel, where the genset is run
very often and the diesel is run only intermitently, one power source which
is specifically designed to provide electric power efficiently can keep all
of the boat's systems running *and* provide that auxiliary power if and when
it is necessary. Electric motors also make it practical to install twin
propellors on sailboats, vastly increasing their close-quarters maneuvering
ability. Since the actual power source is a genset and battery bank, which
can be located wherever there is room (within reason), motors with saildrive
legs can be located wherever one wishes. It would even be possible to mount
motors both fore and aft - though I'm not sure that would be practical...
:->
And, finally, fuel cells will be the primary power source for nearly
*everything* within about twenty years. With an efficiency rating
(currently) of approximately seventy percent, they can silently charge the
battery bank while wringing as much power out of a gallon of fuel as is
humanly possible. Inhumanly possible? Dieselly possible? Well, in any case
they are very efficient and will only become more so. Size is their primary
drawback at the moment, but they are being made smaller all the time - in
Canada, there are even city busses which have been converted-over to fuel
cells with marvelous results.
Rev. Karin Conover-Lewis
(revk...@flash.net)
jfm...@capecod.net
In article <348029B9...@centuryinter.net>,
rsch...@centuryinter.net wrote:
>
> <HTML>
> I've seen in some elect car applications where they've implemented regenerative
> braking. Could this possibly be implemented in a sailboat ???
>
Okay, in spite of the fact that there ain't no brakes on a
boat.....you're onto something. A motor-generator coupled to the
propeller shaft has been tried and it has worked on some long-distance
cruising boats under sail. I seem to recall Eric Hiscock mentioning this
somewhere or other.
How to implement this sort of setup in a small launch would be
interesting. If the boat was moored in a river or tidal channel, for
instance.
Any thoughts?
J.F. Milliken, Boatbuilder
Cape Cod
-------------------==== Posted via Deja News ====-----------------------
http://www.dejanews.com/ Search, Read, Post to Usenet
John Weiss
This is a bit of a switch from the original thread, but...
I have just about decided to buy an electric trolling motor as the tertiary
aux power for my new SeaPearl 21 (sails and oars coming in as pri. and
secondary). The boat is 21' long, 19' waterline, and would weigh in at
1500# or so with the usual 2-person crew and gear. I'll have a single 70AH
gel cell.
I've narrowed the choice down to the Minn Kota Extreme 36 or 42, or Riptide
55, or the MotorGuide Great White 52. All have infinitely variable speeds
with "pulse modulation" control for supposed electrical efficiency at lower
power settings. The Riptide and Great White are for salt water, with
stainless shafts. The other MinnKotas are composite shafts. I'll be using
it mostly in fresh water, but with occasional salt water forays.
Does anyone have any advice or druthers? I'm leaning to the MinnKota EX42.
---------------------
John R. Weiss
Seattle, WA
Remove *NOSPAM* from address to reply
Iain Hibbert
"Rev. Karin Conover-Lewis" <revk...@flash.net> writes:
> And, finally, fuel cells will be the primary power source for nearly
> *everything* within about twenty years. With an efficiency rating
> (currently) of approximately seventy percent, they can silently charge the
> battery bank while wringing as much power out of a gallon of fuel as is
> humanly possible. Inhumanly possible? Dieselly possible? Well, in any case
> they are very efficient and will only become more so. Size is their primary
> drawback at the moment, but they are being made smaller all the time - in
> Canada, there are even city busses which have been converted-over to fuel
> cells with marvelous results.
what are these `fuel cell' things? you just went over my head..
--
iain
John Howell
Its even more an acute problem on a sailboat on two counts..
firstly the lack of realastic space for the energy reserves needed...
and by the time you have the power to recharge....you might just as well
connect the engine straight to the propeller...
The ships the fellow spoke of the other day were only electric propelled and by a big big electric clock motor....synchronous....cos in the war this was easier and cheaper to make than a gearbox...
John Edinburgh
n article <65pes2$d...@bgtnsc02.worldnet.att.net>,
Peggie Hall <peg...@worldnet.att.net> wrote:
>John, I doubt that planing is a consideration on a sailboat. :-) But
>power resources and the ability to renew them are. Which is the basis of
>my wondering how electric propulsion could be practical on a sailboat
>that can't be any bigger than 30-35'.
>
>Peggie
>
>John Howell wrote:
>>
>> Not practical...
>>
>> Leaves no room for the necessaties....by the time you fill the boat with batteries then out goes the AC...the Onan or whatever....and getting on the plane becomes a distant memory
>>
>> John
>>
>> In article <65nu6o$2...@bgtnsc03.worldnet.att.net>,
>> Peggie Hall <peg...@worldnet.att.net> wrote:
>> >guy noir wrote:
>> >>
>> >> Peggie Hall wrote:
>> >>
>> >> > I may be showing my ignorance...but WHY? Seems to me the battery power
>> >> > required would make it totally impractical, with no way to recharge but
>> >> > solar or a wind generator...neither of which--since they rely on
>> >> > nature--are all that reliable. Mind enlightening me?
>> >> >
>> >> > Peggie Hall/Peal Products
John Howell
Electric propulsion is used as another says where distances travelled are not excessive and the speed resticted..
There is a hotel near Windsor in London that has mock steam launches...they are electric propelled and so very green...the visitors can hire them in the Windsor section of the river...
John...
In article <65picl$2...@bgtnsc03.worldnet.att.net>,
Peggie Hall <peg...@worldnet.att.net> wrote:
>Thanks for a very complete answer! Now that I know it's a launch that
>stays close to an AC source for recharging, it makes a lot of sense. I
>just couldn't figure out how it could for any vessel going offshore.
>
>Have you looked at golf cart batteries?
>
>Peggie
>
>Russ Schnorr wrote:
>>
>> I've seen in some elect car applications where they've implemented
>> regenerative braking. Could this possibly be implemented in a sailboat
>> ???
>>
>>
>> Larry Feeney wrote:
>>
>> In article <65muu1$k...@bgtnsc03.worldnet.att.net>,
>> Peggie Hall <peg...@worldnet.att.net> wrote:
>> >James W. Creighton wrote:
>> >>
>> >> We are looking for a north American distributor for a
>> marine electric
>> >> motor capable of moving an 11,000lb flat bottomed sailing
>> dory. Does anyone
>> have
>> >> a name and address they could pass along ?
>> >
>> >I may be showing my ignorance...but WHY? Seems to me the
>> battery power
>> >required would make it totally impractical, with no way to
>> recharge but
>> >solar or a wind generator...neither of which--since they
>> rely on
>> >nature--are all that reliable. Mind enlightening me?
>> >
>> >Peggie Hall/Peal Products
>>
Rev. Karin Conover-Lewis
Iain Hibbert wrote in message <65q070$2...@skate.demon.co.uk>...
To overly simplify them, they are batteries which generate power when the
anode and cathode are exposed to oxygen and a fuel source and a load is
imposed upon the cell, completing the circuit. In real life they are far
more complicated than that, with the most efficient units using liquid
hydrogen as their fuel source. However, units are currently being installed
in homes, schools and businesses in Canada which use natural gas as their
fuel. As opposed to lead/acid batteries, which will hold a charge (in
storage), fuel cells actually *generate* the charge, which can be used
immediately or sent to storage to be used at a later time. However, since
the fuel cell only consumes fuel while a load is being imposed upon it, it
can power electric motors directly with extreme efficiency; when the motor
isn't running, the fuel cell isn't consuming any fuel. But since wind and
solar are free, and since they can't send their electricity to a fuel cell,
boats which have them also will need to have storage cells onboard in
addition to the fuel cell unit itself.
There are many websites which deal extensively with this topic, and which
can explain it far better than I. Run a search on "Fuel Cells" on any of the
major search engines. There is even a small Aluminum/Salt fuel cell unit,
which demonstrates the process, available for purchase by schools through
one of the websites.
Myles J. Swift
John, I have a Minnkota 28 on an 1100 pound sailboat and it is fine for
gettng in and out of the marina. It is not enough to make good progress
into a stiff breeze and chop. Full power on these units really sucks the
batteries down fast. If you want reasonable longevity figure out your
power needs at 60% or less of rated motor output.
Myles
Fabbian G. Dufoe
John Weiss (jrweiss@seanet*NOSPAM*.com) wrote:
: I have just about decided to buy an electric trolling motor as the tertiary
: aux power for my new SeaPearl 21 (sails and oars coming in as pri. and
: secondary). The boat is 21' long, 19' waterline, and would weigh in at
: 1500# or so with the usual 2-person crew and gear. I'll have a single 70AH
: gel cell.
I've used a 28-pound thrust Mercury trolling motor on a heavier
boat than yours (4400 pound Hunter 25 and 2000 pound MacGregor 23). The
Hunter is too much boat for the motor except in very calm conditions. The
MacGregor works pretty well with the motor. At full speed I can make
headway against a 20-knot wind. In light air I can use the lower speed
settings to achieve about three knots while drawing little enough current
that a single 70AH battery will last for about six hours. The Sea Pearl,
being lighter, will work even better. I think you'll be pleased with the
results.
: I've narrowed the choice down to the Minn Kota Extreme 36 or 42, or Riptide
: 55, or the MotorGuide Great White 52. All have infinitely variable speeds
: with "pulse modulation" control for supposed electrical efficiency at lower
: power settings. The Riptide and Great White are for salt water, with
: stainless shafts. The other MinnKotas are composite shafts. I'll be using
: it mostly in fresh water, but with occasional salt water forays.
I don't see a great advantage of a stainless shaft over a
composite shaft for salt water use. However, it's nice to have extra
power when you need it. The "pulse modulation" control means you won't
benefit much from reduced current draw at lower speeds, so the more
powerful motor really does give you reserve capacity. Get the most
powerful trolling motor you can afford. I think you'll be well pleased
with the results.
--
Fabbian G. Dufoe, III
350 Ling-A-Mor Terrace South | email: sf6l...@scfn.thpl.lib.fl.us
St. Petersburg, Florida 33705 |
813-823-2350 | 27 deg 44.5 min N, 82 deg 38.3 min W
Scott Vaughn
I have owned several Great Whites on several different boats, and I wouldn't buy
anything else. My current model is a GW 50 and has been on my boat for about 3
years now and has performed flawlessly.