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Old 23-08-2008, 16:08   #1
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Join Date: Aug 2008
Location: Hervey Bay QLD
Boat: Fusion 40
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fusion 40

hello everyone I am new to this form of communication probably doing it wrong but here goes..
I have a Fusion 40 great boat but does not moter as fast as I would like.Has 30hp yanmars with Gori 3 blade folding props.Am considering D2 75 Volvo saildrives... any negative thoughts on this boat does 8kn. now what could I expect? any help appreciated live and sail Queensland coast.
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Old 23-08-2008, 17:08   #2
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Join Date: Apr 2008
Location: UK and BC, Canada when not sailing
Boat: 25ft Merlin catamaran, 34ft Romany catamaran
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I assume you have a Fusion catamaran?? You may find posting in the Multihulls section more profitable??

Over 20 years ago we were building the 35ft Banshee sailing catamaran. An 8 berth performance cruiser with bridgedeck cabin so probably something like a smaller Fusion in concept.

One US customer fitted twin 90hp outboards. I motor sailed it at 16 knots, and sailed it at 19. I have a photo showing him towing a waterskier at 22 knots (with the rig up).

However the fuel consumption was pretty horrible. At speeds over 10 knots you will need roughly another 10hp for every one knot speed increase.

So how fast do you want to go?? Do you want to do 2mpg or 10?

I would say that 8 knots was a sensible maximum

Richard Woods of Woods Designs
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Old 28-08-2008, 12:50   #3
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Location: Nicholasville, Kentucky
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Aloha Bob,
Welcome aboard! Good luck on your answers. I can't help you much about catamarans but there are plenty others here that can.
Kind regards,
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Old 05-09-2008, 15:59   #4
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hi....I'd at least check into your prop pitch and diameter first. I know just enough to know it's a headache if done wrong.

A mate has a 48ft 8-ish ton cat with twin Yanmar 29hp and 2 blade Varifolds - 15x12. Claims it'll go almost 15 knots full out, but I haven't been there to see it! Will let you know in a few months as our set-up has the exact same thing.

best - Jay
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