Posted by LarryM on September 19, 2012 at 18:11:31 from (76.208.67.203):
In Reply to: Farmall M Carb posted by Dan in TN on September 18, 2012 at 17:49:25:
I have a C-281 that was mildly stuck when I bought it and it just has the old Tractor Supply pistons that makes 67 hp at 540. I believe those pistons make it an 8:1 comprerssion ratio engine. It made 66 with a size 33 venturi but when I tried a size 36 it gave me another horse. The other things that I did was polished the intakes ports, multi angle valve job, port matched the gaskets, electronic ignition, a 450 gas manifold, and the carb is off a C-281 power unit so it looks like an M carb with the choke on the outside versus inside like a Super M. I am running 93 octane with 10% ethanol. Going to a better fuel gave me 3-4 hp even with the lower ompression engine. A size 29 is what the 706 carb had in it. One last note... I have a really good governor and cannot pull it down to 70 hp when I go below 540 PTO rpm.
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Today's Featured Article - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe.
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