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Old 08 April 2004, 04:36   #1
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yamaha vmax

I consider to buy an Osprey Vipermax 7. If the engine has to be a Yamaha 200 hpdi or a Yamaha 200 hpdi VMAX what is the best choice and what exact are the differences in particulary performance and fuel consumption?
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Old 13 April 2004, 19:04   #2
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Well I can say anything about the HPDI, but the VMAX is a thirsty little friend
It's a very nice engine but at full speed it will consume something around 40-50 liters per hour.

I know this will be less when not at WOT, but I think the HPDI is more fuel economic (Can you even use this word with a 200 HP 2 stroke outboard)

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Old 14 April 2004, 01:16   #3
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Well I can say anything about the HPDI, but the VMAX is a thirsty little friend
Rene, i think you are talking about the VMAX that you have that is thirsty, know you can get the VMAX in HPDI and they are great engines.
I think you should go for the VMAX HPDI, it`s also a very nice looking engine.
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Old 14 April 2004, 11:07   #4
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Rene I think Petrov is right. My 2stroke VMax consumes at full throttle about 2 ltrs/mile and I think oil in similar quantities too .
However, I think the VMax HPDI is a great engine less consumption than the 2stroke VMax and great performance. Actually in all VMaxes after 4500-5000 revs when the VMax thing kicks in you get 225bhp
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Old 14 April 2004, 11:29   #5
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Originally Posted by Manos
Actually in all VMaxes after 4500-5000 revs when the VMax thing kicks in you get 225bhp
What is that and what does it do Manos? (The VMax thing?)
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Old 14 April 2004, 13:07   #6
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My 2stroke VMax consumes at full throttle about 2 ltrs/mile
I think you should return it for repair.
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Old 14 April 2004, 14:28   #7
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Cookee I don't know exactly but the VMax technology (according to my engineer) gives 25bhp more to the engine at high revs - over 4500 VMax starts working (i.e 150 VMax = 175 bhp, 200Vmax = 225 bhp). Therefore, the engine keeps having power and torque even at 5500 revs going to 6000. This is correct (not the 25 extra bhp as I don't know whether is 100% correct or not but the acceleration and torque) as I have seen this acceleration and torque effect with my engine.
If you want more details I can ask but this is what I'm told.
If on the other hand someone knows something else please let us know.

JW the consumption is 1.2 ltrs/mile @ 3000-3800 revs and over that it increases to reach 2ltrs/mile @ 6000
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Old 14 April 2004, 15:06   #8
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How big are your fuel tanks Manos?
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Old 14 April 2004, 15:08   #9
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Originally Posted by Manos
150 VMax = 175 bhp, 200Vmax = 225 bhp
I think you ought to get your engineer to tell Yamaha about this - I'm sure they could get more money for their engines if they changed the labels!

On the other hand as you say yourself maybe you are mistaken as I find it hard to imagine Yamaha saying thier engines produced less power than they actually do!
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Old 14 April 2004, 15:13   #10
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Simmons0 2x70 ltrs plus 1x35ltrs

Cookee I believe they say it but in a different way VMAX
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