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Farmall & IHC Tractors Discussion Forum
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ethanol

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dig

07-31-2006 17:17:24




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In most of the debates on the merits of changing to E85 someone will mention the need to increase the carb jet size. I have an H. What would I need to increase the jet to? Super H? M?

I live in southern Wisconsin with E85 readily available. I'd like to try it, but right now I don't have the first idea of what modifications I need to make to my H. I just rebuilt the carb so it has all new gaskets. Replaced the gas filters and sediment bulb. It's been a couple years for a complete tune-up, but it starts on the 2nd revolution. What else is there?

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dig

08-01-2006 07:07:08




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 Re: ethanol in reply to dig, 07-31-2006 17:17:24  
Thank you, gentlemen. If it ever cools off I may start experimenting.



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JT

08-01-2006 06:13:35




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 Re: ethanol in reply to dig, 07-31-2006 17:17:24  
One of the biggest things with E85, you need to get rid of all rubber parts, this stuff will soften any rubber parts and make them like bubble gum. We have a bad time with gasahol and fuel lines, so E85 will be worse. and make sure your fuel tank has been cleaned, spotless, the E85 will clean every bit of rust, dirt, etc out of every part of your fuel system.



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Gary in Mozarks

08-01-2006 02:11:28




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 Re: ethanol in reply to dig, 07-31-2006 17:17:24  
The last time I looked motherearthnews.com had several articles on converting exhisting vehicles to alcohol. I believe Allen is correct in that there needs to be 10% more volume of fuel but then it also has to be leaned out slightly as alcohol already contains some oxygen in the fuel itself. If they can burn it at NASCAR it should work for a tractor.



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RN

07-31-2006 18:10:25




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 Re: ethanol in reply to dig, 07-31-2006 17:17:24  
Carb setting first is good start, then consider raising conpression. Ethanol is very knock resistant but about 90% BTU of gasoline- 8/1 compression would get more use out of it than 6.5/1. RN



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RustyFarmall

07-31-2006 17:50:42




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 Re: ethanol in reply to dig, 07-31-2006 17:17:24  
Try the e-85 without making any modifications to the carb. If it starts to sputter or miss under a load, turn the carb load adjustment out to a total of no more than 5 turns. If that doesn't get it, then you will need to remove the main metering tube and start drilling out those tiny little holes in the tube. Drill the bottom holes first, no more than one drill size bigger than the hole is now, if needed, do the same to the second set of holes, and maybe the third set. You might need to drill them two sizes bigger. Let me clarify by saying that I have never used e-85, but the metering tube is the only thing in the carb that can be easily modified to allow more fuel. There are other things that can be done, but start with this. E-85 is not yet available where I live, when it is, I will experiment also.

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