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Old 19 October 2005, 10:15   #11
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My Instict would say 2 Stroke because of weight, I also believe that some (if not all) 4 Strokes are Finicky about how they are laid down. Perhaps others may have experience of this. All IMHO of course.

Enjoy your new boat which ever way you power it,

Brian
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Old 19 October 2005, 11:48   #12
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Quote:
Originally Posted by anthony
Yes i will be carrying the boat and engine in the car.So would a 2 stroke be the best option?I have narrowed down my choice to:

15hp 2 stroke tohatsu/yamaha (37kg)

15hp 4 stroke suzuki (45kg)

18hp 2 stroke tohatsu (37kg)

20hp 4 stroke honda (46kg)

25hp 2 stroke tohatsu/yamaha (48kg)

does anyone have any comments about this engines.

yes i do have some launch wheels for the boat.

I am very pleased with the Suzuki 15hp 4 stroke but for the same weight you could go for a 25hp 2 stroke!!!

As you boat is quite a bit heavier than mine maybe you should go for the 25hp - you don't HAVE to run it flat out - in fact you may get better economy with a bigger engine as you don't have to push it so hard.

All depends how much lugging around of the engine you are going to do - with my 4 stroke it is really a 2 man job to lift it out of the boot and onto the transom.

As regards being layed down it isn't really a problem as there are 2 lugs on the side which needs to face down. As long as you remember no probs. I can't help but think it can't do the engine much good though. My Suzuki runs fine but when you first start it there is a cloud of white smoke for a few seconds.

To sum up - if weight not a prob get a 2 stroke 25hp - if it is a bit much get the 18hp. To be honest with these SIBs you can't go flat out very often anyway unless the Sea is like a mirror - just gets too bouncy!!!
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Old 19 October 2005, 12:04   #13
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Quote:
Originally Posted by codprawn
To sum up - if weight not a prob get a 2 stroke 25hp - if it is a bit much get the 18hp. To be honest with these SIBs you can't go flat out very often anyway unless the Sea is like a mirror - just gets too bouncy!!!
I'd go along with that. I'd recommed going to a dealer and doing a couple of laps of the showroom carrying each motor to see how you get on!

I had a Zodic Mk1 GT (3.5m) with a 15hp 2 stroke, and it went like a rocket with two people on board and could just about plane four-up. I wouldn't want to carry the engine very far, but it was easily manageable most of the time.

I also had a 4m Avon inflatable with a 25hp outboard which was pretty quick even with four people. The motor was that much heavier though and was a real struggle to move any distance. It was very exciting when the (badly bodged by previous owner) floor came apart on the Thames in the middle of London!

John
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Old 19 October 2005, 13:42   #14
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Have a look at ex-RNLI Mariner 25hp 2-strokes - Not many hours on them, near perfect condition and come out pretty cheap.

Not sure where you would get one, but a mate did and his 4m Inflatable went like stink with that on.(Thats the boat and engine that a couple of us wakeboarded behind)
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Old 19 October 2005, 13:45   #15
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Quote:
Originally Posted by anthony
Yes i will be carrying the boat and engine in the car.So would a 2 stroke be the best option?I have narrowed down my choice to:

15hp 2 stroke tohatsu/yamaha (37kg)

15hp 4 stroke suzuki (45kg)

18hp 2 stroke tohatsu (37kg)

20hp 4 stroke honda (46kg)

25hp 2 stroke tohatsu/yamaha (48kg)

does anyone have any comments about this engines.

yes i do have some launch wheels for the boat.
a couple of questions

does the boat rolled up fit in the car, if it does is there room for the engine comfortably as well.

my qs 3.4 just fits in the landy width wise and the 15 yam fits just inside widthway also

if you can go with 25 and get two props, i have one for towing toys and banging on the plane and one for high speed and cruising, and infact i have a third in the middle of these.

on a sib you can get away with a coarse pitch as the boats are so light and for me this gives me speed and cruising comfort.

as for going flat out, it is fab fun and sib surfing in big swells is the best

have fun
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