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Old 03 August 2008, 13:59   #11
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boats and outboards, appollo duck, e bay,trade it free ads, Boat Trader, Ribnet!!
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Old 03 August 2008, 14:05   #12
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Quote:
Originally Posted by daffid View Post
does anyone i can buy the bombard 380 with 25 hp 2 stroke motor with steering ive bin looking on boats and out boards and googled it and cant find it anyone know any good sites
Am curious - why with steering, rather than a tiller?
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Old 03 August 2008, 15:33   #13
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Daffid,

Not sure how often you are planning to lift this in and out the back of a car but given you are keen on a SIB and were worried elsewhere about engines on their sides I assume that is your plan. I suspect, unless you are going to always have two adults available you will struggle to lift a 25 HP 4-stroke in and out and onto the back of the boat. Its going to be around 70 kg. I struggle to lift a 20 HP 2-stroke on my own - and it weighs just under 50 kg.

If you can find a good nick 2nd hand 2-stroke then thats probably the best option (if new 2 strokes were available I doubt many people would be trying to persuade you to go with the 4-stroke option). But if you are in a hurry then I doubt you will find a decent one, unless you are very lucky. As you are new to boats (and engiens) you are then faced with the issue of spotting a good one.

I can't help much with what speed - but 20 HP 2 -stroke on a similar sized but probably heavier boat with 2 adults on board will do just over 20 knots without optimising the prop etc. Assuming you have the best prop for the job and aren't overloading the boat (1 or 2 adults only) I would think you will be in the 17-24 knot range with either engine you were considering at WOT.

As others have said at this size of engine fuel ecconomy is not normally a major deciding factor.

All boats are a compromise (unless you have unlimited funds). You need to weigh up: top speed <--> ease of portability <--> age/warranty etc on engine.

I would probably lean towards the 15HP 4str - but thats for my personal importance of the above three factors.
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Old 03 August 2008, 16:07   #14
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I would tend to agree with the last post. We had exactly that combination: a Bombard 380 with 15hp 4 stroke Suzuki. Great boat and engine and all round fantastic fun for 2 adults and 2 youngsters. Quite agree with points about portability. I struggled to throw the 15hp around but it was manageable. Wouldn't have liked to try anything bigger. The one thing I would say is that in the year or so that we had it never once did I even think about top speed! I have no idea what it was but my guess wouold be around 20kts. All I know is that it planed fairly easily with us all on board and generally seemed to be a well suited combination.
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Old 04 August 2008, 15:51   #15
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15 or 25 Hp Engine

Quote:
Originally Posted by daffid View Post
does anyone i can buy the bombard 380 with 25 hp 2 stroke motor with steering ive bin looking on boats and out boards and googled it and cant find it anyone know any good sites
Inflating a large 380 sib & high pressure floor, putting the engine, on, off, deflating the sib, rolll it over, put inside car trunk is a hell of a job, maybe suited for youngsters, for peace of mind & back, if your budget can hold start with the best boating procedure, buy yourself a trailer for the 380 and place a nice 25 Hp 2 stroke engine on transom, that will depend on the type of sibbing doing, lake, river, open beach use, if you have a propper tow car & space to keep the water beast secure. If this option is possible, buy the brand engine you most like. Yamaha, Tohatsu, Suzuki, etc.

If budget is low, no towing car nor propper space available, go for a Tohatsu 18 HP short tail, weights nearly the same as any 15 HP, about 51 Kg, but nice to have that extra 3 HP and 50 CC more available when needed, have been reading posts that 2 stroke engines are getting hard to get in UK cause environment not friendly. See if you can buy a second hand then, a very nice nasty portable engine. Buy tiller models, more versatile to use and place on/off transom than steering models.

A Ribnetter certainly will complain about the extra budget on gas compared to 15, why worry, will you be sibbing at full throtthle all the time, the anser is no, prob just to plane faster and then cruise at 1/2 to 3/4 throttle. The gas consumption at full WOT (wide open throttle) for both are: 7.3 for 15, 8.5 for 18 Ltr/Hr. Your wallet nor the nice 380 won't complain at all.

Happy Sibbing
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Old 04 August 2008, 17:49   #16
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A very useful thread as I have just bought an absolutely mint 380 from Ebay for 400 inc transporting.
I am like yourself trying to decide which way to go with engine choice,at the moment I have a 9hp Suzuki which I think is probably too small.
But I am only planning solo or with a mate so the boat will never be really loaded.
Great info
Thanks
Mike
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Old 04 August 2008, 18:13   #17
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I can help you with you origonal question-difference of speed between the two is about 8/10 knots.
As has been advised before-I would deffinately go with a 2 stroke.
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Old 08 August 2008, 08:16   #18
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bombard 380

I have a Honda 20hp 4 stroke on a Bombard Aerotec 380, with the motor raised 1" on the transom. This motor is only 46kg and seems a good match for the boat, and fuel economy is good. As others have said, top speed depends on the number of crew, and wind and wave conditions.

The rolled up 43kg boat can be moved using a sack barrow (13 from B&Q). The engine has good lifting handles and I use an outboard trolley to move it. The boat can be inflated and ready to launch in 20 minutes using the Bravo BST 12HP SuperTurbo pump, a 12V Power Pack, and the Bombard/Zodiac transom wheels. To save time, the wheels and motor are fitted onto the hull at the same time as the electric pump is inflating the tubes and floor.
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Old 08 August 2008, 11:54   #19
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Quote:
Originally Posted by Wavesurfer View Post
I have a Honda 20hp 4 stroke on a Bombard Aerotec 380, with the motor raised 1" on the transom.
Hello, why did you have to raise the engine 1" for :

1-To meet the engine factory distance specs required from boat's bottom to the anticav plate. 2-Excesive watter splash was coming into boat jumping the tubes/ transom area ? Or both issues, can you please explain. Was the sib in a better ride mood as compared to before modification ? Had the same splashing problem with a Tohatsu 18, 2 strokes and a 360 Alum floor Sib. Had to to the same, now excellent performing.

Happy Sibbing
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Old 08 August 2008, 16:41   #20
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thanks for all the replies been really helpful still not managed to find the outfit i want ,the reason i wanted steering was sitting position is far better and more enjoyable have been in a bombard 420 with and without the steering !
is there any other inflatable floor boats like the bombard/ may start a new post as there dont seem to be any 380`s 2nd hand anywhere
thanks again
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