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Old 07 March 2006, 19:12   #1
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How Big

How bigger engine would you put on a flatacraft sportsman 5m rib at the min it has a 70hp 2/ on it
it does go well but im need of speed ive been looking at the 115 opti but would this be to big

or would changing the propella make much difference in speed wise

any help would be thanked
stuart
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Old 07 March 2006, 19:43   #2
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Tried long time ago Force 4 (if I remember right) with old 2 stroke 105 Chrysler and was quite scary but fun if you where at helm.... was over powered

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Old 07 March 2006, 21:15   #3
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i think it would look good a 5m rib with her nose in the air (maybe i shud go 150opti) the girls do say bigger the better
the only thing im worried about is snapping the bak out of her

wat do you mean ova powered in wat respect
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Old 08 March 2006, 06:57   #4
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On the transom somewhere there will be a manufacturers plate stating the maximum HP and the maximum engine weight. On a 5m RIB the max is probably around 90HP. If you go over the manufacturers recommendations then getting insurance will be difficult and you will upset the boats handling.
150opti
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Old 08 March 2006, 10:16   #5
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on the transom there is no plate on it so its hard to say but i think between 90hp and 115hp shud be ok

wat do u think ?
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Old 08 March 2006, 10:41   #6
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Stuart

Most Flatacraft had an engine rating sticker on the dashboard, I presume its no longer there.

I ended up with a 3-cylinder 2-stroke 55HP Suzuki on my Force 4 which was right on the limit I think and 5HP over what it said on the sticker.
It Chine walked very badly until I put some Dole Fins on, and was very stern heavy.

I think a 75HP would be great on yours until you are confident with such a light boat, maybe moving up to a 90HP later.

Its not a very common Flatacraft so you'll find it hard to find anyone with experiance of them.

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Old 08 March 2006, 11:45   #7
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Nasher

would 5hp more than what i have make much difference or would changing the propella be the first job to do

if so wat propella wud you try

thanks stu
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Old 08 March 2006, 16:12   #8
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Originally Posted by ADS
. On a 5m RIB the max is probably around 90HP. If you go over the manufacturers recommendations then getting insurance will be difficult and you will upset the boats handling.
150opti
I agree 150opti , have you gone mad?, you might never find out if it handles it, cos it may have sunk first, thats if you havent taken off before that. 115 2 stoke is a bout 150 kgs and max I would suggest, although 90 preferred if you want to impress without getting wet, and/or scaring your crew to within an inch. Dont do it man , find some other way to impress the laydees
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Old 08 March 2006, 16:20   #9
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thanks for the advice guys you are right i shud be looking at a 90hp 2/ any advice on wat make and model wud be lightest so i have no truble weight wise

wat would the 70hp 2/ i have on it weigh

thanks
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Old 08 March 2006, 18:05   #10
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thanks for the advice guys you are right i shud be looking at a 90hp 2/ any advice on wat make and model wud be lightest so i have no truble weight wise

wat would the 70hp 2/ i have on it weigh

thanks

Nothing in it. Merc wise, todays 2 strokes are same block and weight 139 kilos, take the 90, power trim,as for prop, guys on this forum help the man 19" ????? or what
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