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Reload this Page k241 with no model number cast in block
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Old 05-14-2014, 01:41 PM
Rdrnek Rdrnek is offline
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Default k241 with no model number cast in block
I have what i believe to be a k241 in a 100 i was under the impression that they always cast the model number into the block behind where the starter/pto basket pulley is but there is nothing there... I was hoping I would be lucky and it would be one of k241s that they used the 301 block to build. have you any of you guys ever run across a block without the model cast into it? or know if it means anything?
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149 w/48"deck, 2 100s and and 2 ugly "O"s parts 104
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Old 05-14-2014, 01:47 PM
J-Mech J-Mech is offline
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Only some of the blocks had the model cast into them. Most did not. The ones that did, some were marked as a K301 but were bored to the 241 size.
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Old 05-15-2014, 01:15 AM
Rdrnek Rdrnek is offline
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Ok do you know if you can bore a regular k241 block to the k301 std bore size and make it a 12 horse without any ill effects?
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149 w/48"deck, 2 100s and and 2 ugly "O"s parts 104
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Old 05-15-2014, 07:25 AM
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dvogtvpe dvogtvpe is offline
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some yes, some no. you have to check how thick the castings are. I had 1 old 10 that I took to .090 over 14 bore (3.5). it was thicker than all the 14 blocks that I checked.
If you do decide to make it a 12 you would need a crank, rod and a oil pan also. strokes are different. if you just want to put a 12 piston on a 10 rod the wristpins are different size so you have to deal with that to. can be done just takes time and money.
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Old 05-15-2014, 08:14 AM
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Originally Posted by dvogtvpe View Post
some yes, some no. you have to check how thick the castings are. I had 1 old 10 that I took to .090 over 14 bore (3.5). it was thicker than all the 14 blocks that I checked.
If you do decide to make it a 12 you would need a crank, rod and a oil pan also. strokes are different. if you just want to put a 12 piston on a 10 rod the wristpins are different size so you have to deal with that to. can be done just takes time and money.
The need for a different oil pan on a 12hp vs. 10 hp? Is that because the 12hp all had a deep sump oil pan? My 10's all have the flat pan. Is this a consistent thing? All K241s came with the flat pan? All K301s and above had the deep sump oil pan?
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Old 05-15-2014, 08:35 AM
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yep, because of the longer stroke. 10's were all flat and the 12, 14 and 16 had the bump on the bottom.
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Old 05-15-2014, 09:08 AM
Rdrnek Rdrnek is offline
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Originally Posted by dvogtvpe View Post
some yes, some no. you have to check how thick the castings are. I had 1 old 10 that I took to .090 over 14 bore (3.5). it was thicker than all the 14 blocks that I checked.
If you do decide to make it a 12 you would need a crank, rod and a oil pan also. strokes are different. if you just want to put a 12 piston on a 10 rod the wristpins are different size so you have to deal with that to. can be done just takes time and money.
yeah i figured I would have to change all that... Maybe it would be easier to swap someone my k241 that needs rebuilt for a k301 that is in need of a rebuild
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