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Old 02-23-2011, 12:14 AM
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bridgewatertek bridgewatertek is offline
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Location: Osage IA
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Default Engine question
I know it's been asked before but here we go. I want to overbore a K301 to a K321. Can this be done using the stock K301 crankshaft?
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Jim Bridgewater, KD0FJO Osage, IA
1976 IH Cub Cadet 1650, 44A rotary mower deck, 42" snow blade, QA42A snow thrower, rear blade, cab

Well, that's out of date. Current count is 2 LT1050's, a 76, 1 2284, 1 2130, 1 2135, 1020, and 10 1250- 1650's, with decks, blades, snow throwers, and a Brinly plow
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Old 02-23-2011, 01:31 AM
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d_day2613 d_day2613 is offline
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Default Engine question
I may be wrong, but I do believe that all those engines had the same bottom end in them, just different bore.
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Old 02-23-2011, 07:23 AM
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cubs-n-bxrs cubs-n-bxrs is offline
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A 301 crank is quite a bit lighter than a 321. You will probably end up with something that will vibrate itself to smithereens. I think I would just find a 321 block and have it rebuilt. Not to say the piston wall thickness will be extremely thin. Good luck
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Old 02-23-2011, 08:02 AM
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Matt G. Matt G. is offline
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I also would not bore a K301 to a K321 bore. The cylinder wall remaining may be very thin. The crank is also different.
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