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Can anyone tell me if the crankshaft in a C153 has the same stroke as a crankshaft in a C135?? I’m looking to put a C135 crank into a C153 if it works

also it is a high serial number C135

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cant find book for spec ...for light use would expect it to work. 153=135 block(no sleeves)...however would also expect 153 crank to be heavier

as it is wound tighter but IMO less  torque......would need more info if you expect to work it at the increased ci / rpm

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The crank stroke for a C135 is 4 1/16. The stroke for a C153 is 4 1/4 inched. Therefore will not work on its own. You will need  different rods that are the same as in the C146.

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7 hours ago, mmi said:

153=135 block(no sleeves)

how can that be c135 used a wet sleeve

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3 hours ago, gordon76 said:

how can that be c135 used a wet sleeve

in one of the IH history books it describes how frugal they were in (no R & D $$) re use repurpose everything.they wanted to increase HP so took the 340 block and made it sleeveless ,assumed like 282 less sleeve,but thinking as you say would have to be redesigned like cub block

since 135 started as extension of 113 design      machine shop called them parent bore/-too thin to bore  so 504s got traded when still running good

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