We have a 1939 D4 with pony start, and the best advice I can give you is to find a manual for it. Basically we turn on the gas and start the pony, then when that is warmed up good we turn on the diesel and engage the diesel to the pony, rev up the pony, and get the diesel spinning enough to get oil pressure. I think there is a compression release on the diesel that is used when engaging the pony to it. We always start ours with ether but they may start without it (ours is very tired). Once the diesel is running we shut the gas off and let the pony run itself out. Hope this helps, it is easier to show than it is to tell. Lon
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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