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Old 22 June 2013, 03:18   #1
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Will a Honwave T38 inflatable floor with 9.9 hp plane

Hi all

I'm looking for advice on whether a honwave t38-ie would plane well with a 9.9hp 4 stroke mariner?

I'm stuck with the dilemma of outboard weight as the package will be used while caravaning. The boat would be carrying 2 adults and 2 children .....say about 200kg;with the boat itself just under 50kg.

Could go for higher HP on a 2 stroke but there's nothing around just now.

Thanks
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Old 22 June 2013, 03:37   #2
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Doubtful but if it does only just after a lot of weight shifting. You really need a 2 stroke 15 minimum.
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Old 22 June 2013, 03:56   #3
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My Zodiac 3.6m Fastroller planed with ease with my Mariner 9.9 4-stroke with 2 1/2 up (approx 190kg + 10+ litres fuel + kit) on a relatively calm sea. I think it topped out at just over 12 kts and remained on the plane possibly right down to 1/2 throttle.

I was pleased how quick it popped up on the plane, the Mariner was very willing. Remember that the 4-stroke has significantly more cc than the similar HP 2-stroke versions so will have more torque.
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Old 22 June 2013, 05:20   #4
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Its marginal, It will probably plane on flat water with weight distributed towards the bow. The Zodiac above will plane much easier than the HonWave because it has a flatter planing area than the V hull of the Honda.

However the moment you hit a wave or drop from WOT its going to fall off the plane. IMHO 9.9 on the T38 isnt enough, look for a nice 15-25 hp 2 stroke, theres nothing worse than wanting more power but you can always turn the throttle down if you want to go slower.
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Old 22 June 2013, 05:24   #5
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My Honwave 3.8 would do 18kts with a Honda 20 4 stroke. That was with 2 up and lots of kit.
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Old 22 June 2013, 06:23   #6
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Quote:
Originally Posted by IanH View Post
My Zodiac 3.6m Fastroller planed with ease with my Mariner 9.9 4-stroke with 2 1/2 up (approx 190kg + 10+ litres fuel + kit) on a relatively calm sea. I think it topped out at just over 12 kts and remained on the plane possibly right down to 1/2 throttle.

I was pleased how quick it popped up on the plane, the Mariner was very willing. Remember that the 4-stroke has significantly more cc than the similar HP 2-stroke versions so will have more torque.
That's impressive and unusual.

My 3.4 very light air floor with 15hp 2 stroke Twat, 2 light adults, 2 small under 10 kids and minimal load needs careful distribution and a good run to plane on a flat river and will hit 14 kts. Me and the 10 year old plane easy though and max at around 17 kts.
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Old 22 June 2013, 11:19   #7
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Probably, that is if air top inflated, well ballanced, trimed, engine sitting at proper height. If doesn't plane, will just achieve fast displacement speeds, but will take you there, longer though..

Happy Boating
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Old 22 June 2013, 13:08   #8
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We had mariner 9.9 4 stroke on our bombard c2 3.5m inflatable with an aluminium floor, so a lot heavier than the honwave and that would plane happily with 2 and if we sat everyone right forward it would plane with 3. I was amazed
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Old 24 June 2013, 16:48   #9
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Thanks all. Good to hear as i'm restricted to a 9.9 Max for portability reasons
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Old 25 June 2013, 04:26   #10
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I'll stick my neck out and say that it would not plane with four up. Many Sibs have flatter underwater profiles and ride on their tubes. The honwave has a comparitively large underwater profile so needs a bit more oomph to get it planing. I too had a Honwave 3.8 with 20hp. It was quick with one adult, but would plough a bit with any more than two until nearing WOT. Hope that helps.
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