Thread: 4020 mods?
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Old 06-29-2007, 01:01 PM   #7
ndurbin

Name: ndurbin
Title: Rookie
Status: Not Here
Join Date: Jul 2006
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Posts: 3
No 100% sure on the pump...........but on most JD's on the back end of the injection pump theres a small square cover at the bottom. You can clip off the safety/taper wires and get access to the full load fuel screw (or whatever it's called). Every 1/4 clockwise turn is 25hp @ full throttle.
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