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Old 07 January 2011, 14:42   #31
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Country: UK - England
Town: Gloucestershire
Boat name: Osprey
Make: Osprey Vipermax
Length: 5m +
Engine: E-tec 300 G2
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Originally Posted by Vipermax View Post
Yes sure.
But I find couple of vipermax owner in holland who are riding with mercury 275hp verado at the back and yamaha 300 hpdi which are much heavier engine than the mercury 300xs. And aparently they do not have any problem.

The things that this effect only appear when I reduce the speed. Indeed when I am at wot the boat is fine. But as soon as take the throttle back the boat start to go side to side dangerously and I have put the throttle back on to avoid the effect.

How fast is going your rib and which can of prop you are using four or three blade ?

Thanks.
Hi I get about 45knots out of mine running a 3 blade Viper prop on the e-tec
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Old 07 January 2011, 14:51   #32
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Country: France
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Boat name: Alea Jacta Est
Make: Osprey
Length: 7m +
Engine: mercury 300xs
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Hi I get about 45knots out of mine running a 3 blade Viper prop on the e-tec
Ok thanks. So you are going quiet fast even with a 150hp. Then I should find extra top speed with my 300hp. should not i ?

And how doing the boat in curves ?

What is the layout ?
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Old 07 January 2011, 14:59   #33
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Country: UK - England
Town: Dinard, Brittany
Boat name: Into the Red
Make: Osprey Vipermax
Length: 7m +
Engine: Evinrude E-tec 250HO
MMSI: 235 076 114
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Originally Posted by Vipermax View Post
Ok thanks. So you are going quiet fast even with a 150hp. Then I should find extra top speed with my 300hp. should not i ?

And how doing the boat in curves ?

What is the layout ?
As you can see on the left we've got the closest set up to yours so as an owner with a very similar boat - right down to console and seating and the fact that we both boat en Bretange- I will post properly in response later when I'm on a computer. I will also pm you about a few other things
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Old 07 January 2011, 15:05   #34
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Country: France
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Boat name: Alea Jacta Est
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Originally Posted by gotchiguy View Post
As you can see on the left we've got the closest set up to yours so as an owner with a very similar boat - right down to console and seating and the fact that we both boat en Bretange- I will post properly in response later when I'm on a computer. I will also pm you about a few other things
Ok that could be very helpful.

I saw on the profile that you have got a vipermax 7.20 ? Is it the same hull as mine or bigger?

How is it going with 250 e-tec ?

Thanks.
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Old 07 January 2011, 15:11   #35
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Country: UK - England
Town: Dinard, Brittany
Boat name: Into the Red
Make: Osprey Vipermax
Length: 7m +
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MMSI: 235 076 114
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Ok that could be very helpful.

I saw on the profile that you have got a vipermax 7.20 ? Is it the same hull as mine or bigger?

How is it going with 250 e-tec ?

Thanks.
If you take a tape measure to yours you will find it is at least 720cm probably more, this is of course includingthe tube overhang, ofcourse te 6.5 is the same: it is actually 6.7m if not more.

And also we run the 250HO which is theoretically only 25hp less than you - ie 275. On the train back from boatshow ATM, I will post a proper reply and pm you in less than an hour!
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Old 07 January 2011, 15:20   #36
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Originally Posted by gotchiguy View Post
If you take a tape measure to yours you will find it is at least 720cm probably more, this is of course includingthe tube overhang, ofcourse te 6.5 is the same: it is actually 6.7m if not more.

And also we run the 250HO which is theoretically only 25hp less than you - ie 275. On the train back from boatshow ATM, I will post a proper reply and pm you in less than an hour!
ok;

many thanks.
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Old 07 January 2011, 15:59   #37
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Country: UK - England
Town: Mighty Penryn
Boat name: Little Joe.
Make: Avon Searider
Length: 4m +
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Originally Posted by Jono Garton View Post


Hes not looking for tools, he wants advice on his Osprey
'Coz if he were looking for a tool, he'd be heading in your direction.
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Old 07 January 2011, 16:06   #38
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Country: UK - Channel Islands
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Boat name: Martini II
Make: Arctic 28/FC470
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And also we run the 250HO which is theoretically only 25hp less than you - ie 275.
An Etec 250HO is 275hp?
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Old 07 January 2011, 16:12   #39
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An Etec 250HO is 275hp?
yes the envirude 250 like the mercury 250xs develops around 275hp at the propeller. They come from the "racing" department.
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Old 07 January 2011, 16:13   #40
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An Etec 250HO is 275hp?
Yeah, but it's knowing what to do with it. Jimbo's 198hp was more than enough on the day.
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