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Old 30 May 2008, 13:45   #1
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Country: USA
Town: Houston, TX
Boat name: Lady Ashley
Make: Avon SR 5.4
Length: 5m +
Engine: 70 Merc 2S
Join Date: May 2008
Posts: 96
Survey: Fuel Consumption

Briefly, what is your?
1. Boat length
2. Boat weight
3. Outboard make/model
4. Fuel consumption at cruising speed (gal/hr, lt/hr)
5. Top speed

FYI: Metric/English Ref.
1 liter = .26 gal
1 mt = 39.37 in
1 kg = 2.2 lb
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Old 30 May 2008, 14:13   #2
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Town: The wilds of Wiltshire
Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
Length: 7m +
Engine: Opti 225/Yam 85
MMSI: 235090687/235055163
Join Date: Jul 2005
Posts: 12,645
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Quote:
Originally Posted by jefflee2k View Post
Briefly, what is your?
1. Boat length
2. Boat weight
3. Outboard make/model
4. Fuel consumption at cruising speed (gal/hr, lt/hr)
5. Top speed

FYI: Metric/English Ref.
1 liter = .26 gal
1 mt = 39.37 in
1 kg = 2.2 lb
As profile, about a mile per litre at 20 knots.

And 1 litre is equal to 0.22 imperial gallons and 0.26 USg
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Old 31 May 2008, 10:43   #3
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Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
Quote:
Originally Posted by jefflee2k View Post
Briefly, what is your?
1. Boat length
2. Boat weight
3. Outboard make/model
4. Fuel consumption at cruising speed (gal/hr, lt/hr)
5. Top speed

FYI: Metric/English Ref.
1 liter = .26 gal
1 mt = 39.37 in
1 kg = 2.2 lb
1. Humber Destroyer 5.8m

2. Typically 750kg excluding people perhaps? never weighed it but going on manufacturers quoted wt plus a guess for console, fuel etc

3. Johnson Fastrike 115GL 2 stroke carb

4. Overall fuel consumption about 1.25 litres per mile on each run from fillup to fillup at a range of speeds, no fuel meter fitted this is just miles on the GPS against the amount of fuel put in the tank to fill it up again. Actual tank figures since I started keeping records recently, 1.22/1.25/1.30/1.16/1.23lpm

5. If I take the spare fuel cans out, just over 40kt. Typically loaded, about 39kt trimmed right out, typically loaded and trimmed the way I cruise, it will get to about 36kt.
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Old 31 May 2008, 10:48   #4
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Country: Other
Boat name: "can"
Make: Joker Boat
Length: 4m +
Engine: 40hp e-tec
Join Date: Feb 2007
Posts: 88
Quote:
Originally Posted by jefflee2k View Post
Briefly, what is your?
1. Boat length
2. Boat weight
3. Outboard make/model
4. Fuel consumption at cruising speed (gal/hr, lt/hr)
5. Top speed

FYI: Metric/English Ref.
1 liter = .26 gal
1 mt = 39.37 in
1 kg = 2.2 lb

1. 4.20 Joker boat
2. Almost 450kg full setup.
3. Evinrude e-tec 40hp 2004
4. The best i could get 0.52lt/mile
5. Top speed 30 knots
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Old 31 May 2008, 17:08   #5
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Country: UK - Scotland
Town: Glasgow
Boat name: Riberty
Make: xs 650
Length: 6m +
Engine: suzuki 175
MMSI: 235063328
Join Date: Aug 2007
Posts: 377
Figures from a 40 knt run today - very calm

1. 6.5m - xs
2. guesstimate @ 850kg (100l fuel, 3 adults, 3 children & 1 full set of dive kit
3. Suzuki 175 f/s 23 pitch prop
4. Cruising 4000rpm 1L per n/mile 25/ 28knts
Cruising 5000rpm 1.28L per n/mile 36knt
5. 6100 rpm - 42knts

Figs taken using GPS & fuel flow meter
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Old 31 May 2008, 17:28   #6
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Country: UK - Channel Islands
Town: A large rock
Boat name: La Frette
Make: Osprey Vipermax
Length: 6m +
Engine: 200 Suzzy
Join Date: May 2004
Posts: 2,830
Osprey Vipermax 6.5
Suzuki 200Hp
Overall weight - no idea but apparently around 1500kg
Today, with 5 people, 32 kts at 4,000rpm = 8 gals per hour = 1.1 litre per mile
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Old 01 June 2008, 04:18   #7
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Boat name: Hot Lemon
Make: Scorpion
Length: 8m +
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Send a message via MSN to LURCHER
Diesel

Humber 8.5
top speed 33kn
3 Tons with full fuel
1.1l mile @ 20knots
0.74 per litre
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Old 01 June 2008, 06:01   #8
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Country: UK - Scotland
Town: Stornoway
Make: Scorpion 8.1 mk2
Length: 8m +
Engine: Yam F250 4.2 Litre
Join Date: Aug 2006
Posts: 193
Survey Fuel Consumption

1. Tornado 7.5 x 2.75 beam
2. 1500kgs
3. Yamaha 300 hpdi
4. Light load 30 lph @ 30 mph, loaded 36lph @ 30 mph.
5. 63mph / 54 knots = 100 LITRES AN HOUR!!!!!

Taken using Yamaha fuel flow guage & Lowrance GPS
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Old 01 June 2008, 11:43   #9
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Make: Avon Searider
Length: 4m +
Engine: Honda BF50
Join Date: Aug 2005
Posts: 8,841
Quote:
Originally Posted by Erin View Post
Osprey Vipermax 6.5
Suzuki 200Hp
Overall weight - no idea but apparently around 1500kg
Today, with 5 people, 32 kts at 4,000rpm = 8 gals per hour = 1.1 litre per mile
What pitch prop are you running and what sort of top speeds are you achieving?
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Old 01 June 2008, 14:52   #10
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Country: UK - Channel Islands
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Boat name: La Frette
Make: Osprey Vipermax
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Engine: 200 Suzzy
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I'm using a 23".

I have only very briefly opened up the throttle and noted 42kts on the GPS, but revs were only just over the 5k mark by that point, although were still climbing. I'm only 4 hours into the running in, so I'm reluctant to run at wot until I've done a few more hours.
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