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JJ MARSHALL

crank shalf

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HubbardRA
The 12 Hp crank is basically the same as the 14 and 16 Hp cranks. The exception is that the balance weights are lighter. A 14 and 16 Hp crank will interchange, they are the same, and the pistons and rods weigh the same. A 12 Hp crank can be used in a 14 Hp but the vibration may tear the engine apart unless it is re-balanced. This is not extremely hard. If you have the bad 14 Hp crank, weigh it. Then add weight to the 12 Hp crank to make it the same as the 14 Hp. The weight should be added to the heavy part of the counterbalance and equally divided between the two counterbalance weights. It needs to be welded on by a good welder. If it comes loose while the engine is running it can ruin the engine. Some of the people who build "pro-stock" tractor pulling engines have facilities to balance engines. You could find one of these people and have the crank re-balanced to match the piston. Another crank would probably be cheaper.

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maxtorman1234
Hello, Some 12HP cranks are the same as the 14's, but some have lighter weights as Rod said. Someone took the balance gears out of a 12 with the light crank, and it has tons of vibration. The others arent too bad without the weights.

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