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Old 26-09-2010, 16:25   #16
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Factor..I've looked online at the Seawinds..but do not like the open back. However, I really appreciate the affirmation that a mid-30 foot boat with outboards are out there and comfortable
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Old 26-09-2010, 16:26   #17
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I fully agree that Outboards are suitable for cruising multihulls.
However you can't just hang them over the back of a cat. the boat has to be designed for outboards or pods made which are more central.
I put extra long shafts on mine.

I have a 39 ft trimaran which is a motor/sailor 2 X two stroke outboards but for economy usually only run one motor at a time.
I like the fact that I can lift the props clear of the water.
That outboards are lighter.
They are considerably cheaper.
No interior diesel smell.

I went for two stokes rather than four strokes, again for cost reasons and the ability to make easy repairs.
I have been told that if you run the two stokes at between 3500 - 4,500 revs the motors only use 10% more fuel than a four stroke.

I do not consider storing gasoline a problem on a boat HOWEVER I would not have an inboard gasoline motor for safety reasons.
I have two 200 watt solar panels and a Kipor 2kva generator, Gas for hot water and for cooking
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Old 26-09-2010, 16:40   #18
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beau,

I am a two-stroker also. With powertrain management controllers nowaday, direct injection...the added weight savings...almost as clean (exhaust) as 4-strokes..less maintenance (no valves to adjust).

You may not just be able to hang them on the back, but on the back transom it can be done..depending on the rear layout. I'm not a fluent boat individual when it comes to what the devices are called, but a outboard mounting system that swings out and down to lower the unit inot the water is what I've seen. Of course the longer lower-end shaft is a must.
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Old 26-09-2010, 17:01   #19
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PDQ mounted the outboards 65% aft, for the absolute minimum aeration. I have heard mine cavitate, but one or both hulls were pretty much airborn at the time!

The two stroke is dead in the US for small engines. For larger engines the injected two strokes are heavier than 4 strokes, or they cost more!

As far as I know, the PDQ 36 was the biggest outboard equipped cruising cat in production, but there are several One-offs, and some kit boats currently available.
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Old 26-09-2010, 17:07   #20
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Quote:
Originally Posted by sandy daugherty View Post
The two stroke is dead in the US for small engines. For larger engines the injected two strokes are heavier than 4 strokes, or they cost more!
I take it you say dead for small due to emissions. For the larger my last boat had a Mercruiser Optimax 150 two-stroke that was lighter and cheaper than a comparable Yamaha 4 stroke ???
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Old 26-09-2010, 17:37   #21
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One other small point in favor of outboards on smaller cats -- often your homeowners insurance will extend liability coverage to any boat you own with a motor of less than 25 HP (in the case of our insurer). I mentioned this to a friend last winter who sails a 33-foot cat and his eyes lit up.
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Old 26-09-2010, 17:38   #22
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I should amend that post to say: I think the coverage is for bots with outboards only, not inboards -- though I would have to go re-read my policy. . . .
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Old 26-09-2010, 17:43   #23
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Chief, i finally remembered the name of that large cat that I believe has twin honda outboards. I was called HUMUHUMU. I believe it is now in charter in Mexico. it was a 68' cat
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Old 26-09-2010, 17:44   #24
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Hi there,

Here is another outboard powered possibility to add to the mix from Easy Catamarans their cats up to 37 feet are outboard powered and their designs look good as well and are quite popular here in Australia.

Easy catamarans

Shuttleworth designs also does outboard powered and I know that they use up to 25HP but I don't know too much about them.
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Old 27-09-2010, 03:26   #25
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Ozbullwinkle,

I do not have the facilities or time to build a boat from scratch. Also, the Easy Cat's page you posted have not updated their designs since 2007 and do not have a lot of pictures and layout diagrams. Again, these all prove my point that a <40' cat can and has been made with outboards and that the benefits outweigh the negatives. So, as Sandy eluded too it's all about $$$$ to the main production builders and not about simplicity, reliability and cost TO BUYER!

For all we know Yahmar and SD saildrives are putting $$ in the builders pockets for using their products (like pharmacutical sales people do to doctors who recommend their drug).

Thanks to all who are posting.....what if anything can we do to get a baot like this mass produced? Here's a brroker question..what has been the market share for Cats in the last say 4-5 years (number of sales in the 30-40' range vs >50..and price of the highest volume movers)
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Old 27-09-2010, 05:27   #26
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Army Chief,

First of all, thanks for goining over to the sand box to finish the job. We should have finished it in the early 90's.

From the sounds of it you might try looking at the PDQ36 as your best option.
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Old 27-09-2010, 05:29   #27
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amytom,

No thanks needed..but thanks :0

I've served in the Army for over 25 years now and hope to continue for another 19 !

As for the PDQ36..it is the best factory option with outboards, that is correct. I have not walked on one yet. However, based off the pctures online, I do not like the mast beam going through the salon table area for one.
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Old 27-09-2010, 07:47   #28
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Quote:
Originally Posted by stacy View Post
Chief, i finally remembered the name of that large cat that I believe has twin honda outboards. I was called HUMUHUMU. I believe it is now in charter in Mexico. it was a 68' cat
Here it is
Quote:
The Catamaran Company - Log In

Engines
Manufacturer Model Engine Fuel Type H.P. Engine Type Year Approx. Hours
#1 Honda BF 130 Gas 130 Outboard 1998 1200
#2 Honda BF 130 Gas 130 Outboard 1998 1200

Approximate Capacities and Speeds
Fuel Capacity: 270 gallons
Approx. Cruise Speed: 7 knots
Approx. Max Speed: 14 knots
270 gallons
Thats a lot of petrol.
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Old 27-09-2010, 08:03   #29
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A nice quote from Mr. Sandy Daughtery

"Fear not the lowly gasoline outboard, they want only to serve, not to rule your life.
LOL, Sandy just bought a new boat...with twin diesels...

Seriously, it really depends on the boat usage. If you plan on being at the dock, and it's mostly day sailing, outboards are a great choice. If lot's of cruising is on the horizon, I don't think you can beat a diesel for safety, longevity, economy and charging capacity.
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Old 27-09-2010, 08:11   #30
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f-41 or f-44 can both be built with outboards.
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