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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 electric outboards		  New Topic  Topic Locked
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fareid
Deckhand

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USA
1 Posts
Initially Posted - 06/09/2005 :  04:34:12  Show Profile
Anyone have experience with the larger electric outboards on a C25? Examples are Ray Outbds and Outboard-Electric companies' 4.5 hp units(equiv. to approx 7 hp 2 stroke)? These operate on 48V batteries drawing about 80 amps peak, or 30 amps at 1/2 power. Overnight 110v or 5 day large solar chargers.
farsail
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 06/09/2005 :  08:39:45  Show Profile
Morning Fred,

Welcome to the forum. There was some discussion regarding electric propulsion about a year ago. The search function above might dig up the posts you require, give it a try.

Val on Calista # 3936
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existentialsailor
Master Marine Consultant

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USA
1180 Posts
Response Posted - 06/09/2005 :  08:50:49  Show Profile
Practical Sailor did a piece on this last month. They seemed impressed with a couple of models, even mentioned a 30 foot sail boat using one. I would wonder if the added weight of the batteries would be offset by the lessor weight of the motor and the lack of a fuel tank.
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Leon Sisson
Master Marine Consultant

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USA
1893 Posts
Response Posted - 06/09/2005 :  09:21:48  Show Profile  Visit Leon Sisson's Homepage
fareid,
From time to time there has been some discussion of electric aux. power for sailboats over on [url="http://bbs.trailersailor.com/forums/trailersailor/index.cgi"]Trailer Sailor BBS[/url]. As I recall, a couple of people over there have pulled togehter sort of a FAQ on the topic. A couple of really short answers are:

Obviously motor size (HP) depends on the worst case conditions you'll ever need to motor through. There's quite a difference between getting in an out of a boat slip on a quiet lake, vs. running an ocean inlet against the tide in rough weather.

Battery bank size (weight) depends on how far you need to motor between charges.

-- Leon Sisson
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Brent
1st Mate

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USA
37 Posts
Response Posted - 06/09/2005 :  18:34:29  Show Profile
Fareid,

We use an electric motor exclusivly on our boat. When we purchased the boat we removed and stored the British Seagull motor and installed a Motor Guide transom mount 110# thrust salt water trolling motor. It is a 36 volt motor which runs on three deep cycle bateries from Sam's Club. The batteries are mounted under the rear berth. The boat trims out well with two people in the cockpit and the batteries underneath.

We sail on a lake just outside of Jackson Mississippi. No currents, no comercial traffic, no tides. Our only need for speed is to outrun the occasional thunderstorm.

The motor attaches to the standard motor mount with clamps and has a plug that goes into the deck for power. Due to the configuration of the motor we are able to spin the boat about its keel with no forward movement at all. It makes docking in tight places easy.

When you compute the battery capacity and motor load (running at the highest setting) we have about 3 hours of run time at full power. To date we have not run the motor on any single occasion more than about thirty minutes.

Its top speed is definatley slower than with a standard outboard, but we only have about 75 yards to open water. It can stop the boat with little effort compared to the typical outboard motor. I would not hesitate to give someone a tow with it either.

Bottom line: We love it, have never felt unsafe using it, it has never failed to start, it has never stalled, it has never slipped out of gear, and we never smell gas and oil on our trips (at least not from our motor), and it is extremely quiet, but we would never rely on it outside of an inland lake.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.