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Old 01-20-2012, 06:11 AM   #1
Tony B's Avatar
City: Joe Wheeler State Park, Al
Country: Cruising/Live-Aboard USA
Vessel Name: Serenity
Vessel Model: Mainship 36 Dual Cabin -1986
Join Date: Jul 2011
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Fuel Consumption 0f Crusader Marine 502XL

I was looking at the specs on a 41' Silverton and it had*twin Crusader Marine 502XL's.

I looked up specs on this engine and it shows 27GPH at 4600 RPM. What kind of fuel consumption could I expect at about 6*or 7 kts? I dont know what the RPM would be at that speed.

Thanks in advance.

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Old 01-21-2012, 03:11 AM   #2
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Join Date: Oct 2007
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RE: Fuel Consumption 0f Crusader Marine 502XL

Your boat will take only high idle at that speed, not much fuel as gas is fine at being efficient at almost no power.

Finf out the weight of the boat in pounds and divide by 2240. That is the weight in Tons.

2 or 3 hp per ton should cruise you and the engine will make about 10 hp from each gallon of gas.

A boat that is designed to operate fast may stink at helm commands at low speed due to small rudders.

Also there may be a huge lack of a seakindly ride , due to the low speed.

Every boat is different , when removed from its built operating regime , a sea trial would be required.

Avoid a wallowing pig boat , regardless of the price , unless its selected as dock condo .
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