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Old 06 April 2009, 08:41   #1
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Country: Other
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Boat name: Meu Menino
Make: Valiant
Length: 4m +
Engine: Mariner 30EFI
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Will it be much difference in upgrading from 30 to 40hp?

Hi,
I've been thinking... is there a big difference in 10hp? I mean, upgrading from 30 to 40 hp will make much of a difference ?
The actual engine is a Mariner 30hp, the maximum recomended by Valiant is 40hp. It's a 33% increase in power, so the top speed must increase, but how much?

Cheers
Hugo
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Old 06 April 2009, 08:46   #2
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Country: UK - England
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Boat name: Jammy Dodger
Make: Avon Adventure 7.20
Length: 7m +
Engine: 200 Yamaha
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What boat have you got at the moment? what is the top speed of it with the 30hp
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Old 06 April 2009, 10:49   #3
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Make: Valiant
Length: 4m +
Engine: Mariner 30EFI
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Hi
I have a Valiant Vanguard 400, top speed is 27kn.
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Old 09 April 2009, 10:16   #4
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Country: UK - England
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it is easy to upgrade your obm but not cheap and your insurance could be affected give me a ring 01869 326411
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Old 18 April 2009, 12:48   #5
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Country: Netherlands
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Make: Brig F360S
Length: 3m +
Engine: Yamaha 70hp
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You'll feel the extra HP especially when out on the water with much load. If you want extra top speed you have to prop it right, otherwise it'll only accelerate faster. Expect 3 to 4 knots extra speed.
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Old 20 April 2009, 04:49   #6
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Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
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The only advantage to having the extera 10 hp is if you carry divers or a heavy load. You may find that the boat becomes unstable at WOT and 40 hp.
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