I agree on need for the auxiliary transmission- you couldn't bulldoze without one, because you couldn't adjust the blade to the terrain fast enough to get anything level. Finding a Model A transmission is easy, but good luck finding a bell housing. I remember seeing an article somewhere on making a bell housing so you could install a Model A transmission (I assume it was in an Oliver magazine). IIRC, they used a piece of 6" well casing, with flat rings welded to both ends to mount it to the transmission and to the engine. Had plans for both rings & the bolt patterns, and the length of casing needed.
I have an OC4, and its got a usable ground speed in low, but still not as slow as I'd like. You could buy the OC4 with either an auxiliary transmission, or a reverser. Mine has the reverser (still need to use the clutch), and I'm glad I have the reverser than the aux transmission.
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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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