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Old 07 February 2012, 12:29   #11
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I would guess 250 will be enough on a 8 meter rib!!

We had 225 (2 stroke) on a 7.5 meter and it was a good 48 Knot boat all day long. i have no experinence of the hull you are buying but i guess in real terms you are not really going to notice the difference in performance between the 250 and 300hp.

It maybe a bit more efficient but this is always a tough one because if your anything like me, the more horses you have the more you use them!!!

if you are loading the boat up with lots of people or weight then maybe the extra gg's will help but depends on your type of use!
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Old 07 February 2012, 14:56   #12
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Thanks Zippy, appreciate you going to the trouble to reply, V useful!
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Old 07 February 2012, 15:00   #13
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Old 07 February 2012, 15:14   #14
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Old 07 February 2012, 15:20   #15
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Thanks Zippy, appreciate you going to the trouble to reply, V useful!


There are only two reasons why a 250 would be preferable to a 300 if the hull is rated to 300hp, weight and cost. If they weigh the same, that only leaves cost. As for performance/economy, the 300 will obviously out perform the 250 in terms of acceleration and grunt, top end would be determined by propping. The 300 may possibly be more economical, as it wont be working as hard most of the time, or the difference between the two wouldn't be worth worrying about.

225hp/7m = 48knts is pretty meaningless. Which 225, which 7m? Every combination will give a different result.
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Old 07 February 2012, 15:29   #16
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As the OP is looking to buy second-hand, I'd suggest the buying decision includes more variables than just hp.

I thought the OP had already bought one, as his/her profile shows Ribeye 7m+/300Yam
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Old 07 February 2012, 15:31   #17
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Old 07 February 2012, 15:59   #18
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As the OP is looking to buy second-hand, I'd suggest the buying decision includes more variables than just hp.

I thought the OP had already bought one, as his/her profile shows Ribeye 7m+/300Yam
It must be a fairly new one as he older ones were only supplied upto 250 hp
I had a 785 with 225 4st good for 50knts lightly laden but did chine walk at the top end
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Old 08 February 2012, 02:42   #19
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It must be a fairly new one as he older ones were only supplied upto 250 hp
I had a 785 with 225 4st good for 50knts lightly laden but did chine walk at the top end
I did think it must be a heavy boat if the op wanted to put 300 on it for a 785 .... so if a 225 made that hull chine walk (if its the same hull just uprated) and its now got a 300 on it .. with paying punters in it/renting it
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Old 08 February 2012, 06:50   #20
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300HP every time. PM me.
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