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07-10-2016, 07:09 PM
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#1
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Veteran Member
City: Pensacola, Fl
Country: USA
Vessel Name: Sakura Perdido
Vessel Model: Grand Banks 36 Classic
Join Date: Jul 2016
Posts: 35
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Fuel Consumption
I have a 1984 GB 36 Classic with a Ford Lehman 120. It's "new" to me and I've had a fuel line leak into the bilge so it's difficult to determine what I'm burning. What are other people with a similar motor seeing as a fuel consumption rate?
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07-10-2016, 07:32 PM
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#2
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Guru
City: Jacksonville
Country: USA
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 3,064
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Why not just wait until you have run her some more and see what you get.
Every boat is different.
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07-10-2016, 07:38 PM
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#3
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Enigma
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 11,092
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Greetings,
Mr. B. Welcome aboard. I think you can expect in the neighborhood of 1.75 GPH to 2+a bit GPH depending on RPM. 1750 (the "sweet spot" for Lehmans) should yield around the 2 GPH mark.
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RTF
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07-10-2016, 07:45 PM
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#4
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Veteran Member
City: Pensacola, Fl
Country: USA
Vessel Name: Sakura Perdido
Vessel Model: Grand Banks 36 Classic
Join Date: Jul 2016
Posts: 35
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Yes, I'm planning to do that but I'd like to know what other people are seeing to use as a basis for comparisson.
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07-10-2016, 08:21 PM
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#5
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Guru
City: New England and Canada to Florida
Country: USA EAST
Vessel Name: Tadhana
Vessel Model: Helmsman 38 Pilothouse
Join Date: Jul 2011
Posts: 554
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We have a Helmsman 38. Fully electronic engine, 230 hp cummins, so we get the GPH reported digitally at every speed. We find at 7 kt we burn 2.3-2.5 GPH
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07-10-2016, 08:39 PM
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#6
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Guru
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 14,794
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Bryant,
You've got a good boat for minimizing fuel burn relative to boat size in a SD design. Most GB 36's are twins w a total of 760 cu in displacement.
A 50% load is 3gph.
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Eric
North Western Washington State USA
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07-11-2016, 06:15 AM
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#7
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Guru
Join Date: Jun 2008
Posts: 3,039
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Quote:
Originally Posted by Bryant
I have a 1984 GB 36 Classic with a Ford Lehman 120. It's "new" to me and I've had a fuel line leak into the bilge so it's difficult to determine what I'm burning. What are other people with a similar motor seeing as a fuel consumption rate?
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I have a 40 Albin with a single Lehman. I burn about 1.75 gal per hour at around 1700/1750 rpm. Like RT said you should be in that range.
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Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
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07-11-2016, 06:20 AM
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#8
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Guru
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 17,874
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Like Jay, slightly bigger prop.....burn near 2 gph up around 1650 rpm.
Pushes my boat with a 34 foot lwl about 6.3 knots average still water speed.
Averaged over my last 10,000 miles.....1.9 gph at 6.3 knots for 3.3 nmpg.
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07-11-2016, 07:08 AM
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#9
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Guru
City: gulf coast
Country: pinellas
Join Date: Jun 2014
Posts: 2,490
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depends first on how fast you go.
I don't see how you could possibly run the boat if the fuel was leaking in sufficient quantity to affect mileage. What you get now is what you will get later.
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