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Case Tractors Discussion Forum
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Terrible fuel economy on DC

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Alan Whitaker

05-11-2006 17:56:12




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I used 7 gallons of gasoline disking about two acres. I use an 7' drag disk and was cutting it hard trying to cover some oat stubble for a seed bed. But 7 gallons seems to much, especially at near $3/gal. This tractor is a dual-fuel setup. I have another that I've never started that is straight gas. Would it do better? What can I do to improve the fuel consumption?




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billkoob1

05-14-2006 00:57:07




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
Read some of the posts on economy below. Your tractor has a disconnect some place. A gasser should not burn over 5 gallons per hour even with 4 1/16" pistons (with carb. rework). My DC lpg (factory) but modified somewhat would drag a 13 1/2', 16" blades. case tandum disk in anything in 3rd gear and only burn 4 gallons per hour max. Corn stocks it wouldn't burn 3 gallons per hour. At 7 gallons per hour you would have a 70+ hp dc. An LA would'nt burn 7 gallons per hour in the field and propane LA would normally run at 5 gallons per hour on a heavy draft load. The kicker maybe the low compression heads on your tractor!

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Glenn F.

05-12-2006 09:51:11




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
If you got 'er maxed out that sounds about right. Crazy thing is, they will use just about as much if they're raking hay. Glenn



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C. Amick

05-12-2006 09:37:42




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
That's around a 260 cubic inch engine in that DC. It's probably not going to do much better than that. I have a dual fuel Case SC that I run on kerosene. It seems to use a little less fuel than the gasoline SC's that I have. I only have about 70% of the horse power running on kerosene, though.



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D boll

05-12-2006 05:04:22




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
Dad always said his DC with 5505 head and 4" pistons would take 2.5gph plowing, ect. Granted the gas of old was better than the slop they sell today!



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Walt Davies

05-11-2006 22:26:49




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
You have a multifuel engine so the compression will be around 4 to 1 very low so you can run Kerosene. You can increase the compression to around 8 to 1 not over that for todays fules. It will help some in power and GPH. Actually 3.5 GPH is about right for that tractor under a full load. About the only thing that can help would be to get a diesel tractor they can run a lot better on less fuel. These early case tractors were not known for good fuel GPH. My case LA under a full load will burn around 4 to 5 GPH but will pull a 4 or 5 bottom plow. Running with a 20 in. with 32 of them on the ground I can run 2nd gear in good soil that helps alot. If I was you I would look around for Case 500 or 600 diesel it will get much better GPH and do the same work.

Walt

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IA Roy

05-11-2006 20:20:58




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
Have you checked the timing? How was it running? Did it seeim like it had plenty of power? What do the plugs look like after that workout. They should be a light gray if fuel mixture is correct.



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Alan Whitaker

05-11-2006 20:32:50




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 Re: Terrible fuel economy on DC in reply to IA Roy, 05-11-2006 20:20:58  
The tractor runs good. Plenty of power. I've not checked the plugs. i'll do that tommorrow. Maybe I should change the plugs. What plugs are suggested?



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Case1950

05-12-2006 16:10:51




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 20:32:50  
I use Autolite 386 in my DC"s. Works better than the Champions.

Case1950



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Mathias NY

05-11-2006 19:51:32




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 Re: Terrible fuel economy on DC in reply to Alan Whitaker, 05-11-2006 17:56:12  
How long were you disking? Unless you spent 4 hours at it, that does sound like a lot of fuel. If your fuel measurements are correct, 2 ideas come to mind. I am assuming you are running gasoline in spite of the dual fuel setup.

First, if your exhaust was black the tractor is running too rich. If the carburator could either be set too rich or the choke may not be open all the way.

The other possibility is that there is a fuel leak. My tractor will leak a steady stream of fuel out of the carburator when the engine is off and the sediment bowl is not. I would be shocked if mine was the only one that did this.

For comparison, my DO runs straight gas. It burns 5 quarts per hour when pulling a 6' bush hog in moderate grass.

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Alan Whitaker

05-11-2006 20:35:47




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 Re: Terrible fuel economy on DC in reply to Mathias NY, 05-11-2006 19:51:32  
I disked for 2 hours. No black smoke, choke seems to be open and no fuel leaks (while running).



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