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Old 03 June 2008, 16:24   #21
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Country: UK - Wales
Town: swansea
Boat name: Too Blue
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Quote:
Originally Posted by Hugh Jardon View Post
most similar size engines are quite similar on consumption at wot, its the cruising range that makes the difference for dfi and fourstroke engines.

i should imagine your 225 is having to work quite hard to push that boat along so a bigger engine will probably prove more efficient for fuel .....depending on which one you go for!

on yes and on the survey it averages around 1l per mile on a 6.5 vipermax with 200 opti with typically two adults and two children and typically full of fuel and more pies than you can shake a stick at!
Yes I agree - that's why I want a 300 or a 350 - much less time spent at WOT - economical cruise will be my current top speed!!!
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Old 03 June 2008, 17:00   #22
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Vipermax 6.2 with Evinrude DI (Ficht) 150hp

About 1300kgs....ish

Haven't done any accurate fuel consumption tests (don't want to scare myself ) but my obserations are as follows.

Fuel Flow reading........Speed............Revs

.........35LPH............26-30Knots........3500

.........65LPH..............41Knots...........4900

So that's kind of in keeping with the 1L/mile rule for modern outboards.

That was backed up by a 80mile cruise in Feburary that cost me 80 in fuel in the good old 1/liter days This impressed me as it was a mixture of cruising in less than Ideal conditions, some blatting around/having fun and punching a strong tide from the Needles to Southampton, so I was pretty impressed. One day I'll get to calibrating the fuel flow meter.
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Old 03 June 2008, 17:09   #23
RJH
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Ribcraft 7.5m
Suzuki 250 hp 4 stroke
Weight - not sure but I guess around 1500 kgs (but could be heavier with fuel etc). Must look it up one day!
Max speed around 48 kts
Fuel consumption - all speed average over 12 months 1.4 ltrs / nm
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Old 03 June 2008, 17:17   #24
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Country: UK - England
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Boat name: The Bandit &
Make: Hunton Rib
Length: 10m +
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Hunton 10m
2 x 8.1 litre mercruiser inboards
weight 2700kg dry
top speed hopefully 80mph
32 gallons per hour each engine
1.25 miles per gallon

i'm interesed to see what the fuel consumption would be at 50 ish
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Old 03 June 2008, 18:45   #25
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Quote:
Originally Posted by the bandit View Post
Hunton 10m
2 x 8.1 litre mercruiser inboards
weight 2700kg dry
top speed hopefully 80mph
32 gallons per hour each engine
1.25 miles per gallon

i'm interesed to see what the fuel consumption would be at 50 ish
fech me so if you charge around at wot and it is using 32 uk gals per hour each engine then i make that around 380 per hour at marina fuel prices

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Old 04 June 2008, 02:51   #26
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fech me so if you charge around at wot and it is using 32 uk gals per hour each engine then i make that around 380 per hour at marina fuel prices

Yea but we should be covering 80 miles in that time.

Still will find out on the 21st we have 1600 miles to do in 10 days
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Old 04 June 2008, 04:53   #27
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So that would be 7600 worth of fuel at marina prices

An easyjet flight to cover a similar distance would probably be around 70!! - and the plane would probably use less fuel
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Old 04 June 2008, 08:23   #28
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So that would be 7600 worth of fuel at marina prices

An easyjet flight to cover a similar distance would probably be around 70!! - and the plane would probably use less fuel

mmm not a good carbon foot print

Believe it or not i would be happy if thats all we spend on fuel for the RB8

We have lots of testing to do next week.

we ain't rich either just passionate about the race

wwwfollowthebandit.com
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Old 04 June 2008, 12:47   #29
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Country: UK - England
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Engine: 150hp Optimax
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1.1 L/Nm

150 Opti

6.5M

Driven hard!!
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Old 06 June 2008, 10:07   #30
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Country: Switzerland
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Make: Scorpion
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Engine: Merc Optimax 300xs
Join Date: Sep 2006
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5.2mt valiant
75 E-tec
About 500kgs
We get around 7 to 8 miles per gallon cruising at 20-25

All done through fuel flow meter connected to LCX 27c. It was a 25c but got the new software via an aerial warranty claim.

Steve.
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