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Deere 4020 Power, Reliability Boosted By EFI Conversion
David Kepner threw away the carburetor on his Deere 4020 gas tractor and replaced it with an electronic fuel ignition (EFI) system designed for a pickup.
Kepner is a retired 74-year-old Deere mechanic who says he still does a little farming with his 4020. “I came up with the idea because I wanted it to run as
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Deere 4020 Power Reliability Boosted By EFI Conversion TRACTORS Conversions David Kepner threw away the carburetor on his Deere 4020 gas tractor and replaced it with an electronic fuel ignition EFI system designed for a pickup Kepner is a retired 74-year-old Deere mechanic who says he still does a little farming with his 4020 “I came up with the idea because I wanted it to run as well as my pickup I started looking around for anyone who makes an EFI kit for farm tractors I couldn’t find any but I did find a company in Memphis Tenn that supplies EFI kits for classic cars and pickups and adapted one of their kits www fuelairspark com; ph 901 260-3278 I made changes to the tractor’s intake manifold and to the throttle body that controls the air system ” He replaced the tractor’s rusty steel fuel tank with a polyurethane tank “These tractors are almost 50 years old and many of them haven’t been used for years so their fuel tanks are often contaminated ” he notes An air intake hose leads from the air cleaner to the throttle body which controls the air flow when you accelerate the tractor “You want to maintain a 14:1 air-to-fuel ratio so that when the tractor slows down it doesn’t suck as much air in ” says Kepner A fuel rail leads from the pump at the bottom of the tank and then to a fuel pressure-regulating valve that regulates the fuel pressure to the injectors After he equipped his 4020 with EFI it didn’t take long for neighbors to start asking Kepner if he would convert their tractors He plans to do that for about a half dozen local farmers “When people ask me about the cost I tell them it’s less than what it would cost to have a body shop paint their tractor It’ll cost at least $3 500 but not more than $5 000 I tell them I’m so confident in EFI that if they don’t like how their tractor runs when I’m done with it I’ll buy the tractor from them ” Kepner says he plans to make a kit available some day Contact: FARM SHOW Followup David J Kepner 27724 Wyanet-Walnut Rd Walnut Ill 61376 ph 815 303-5660
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