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Finished my rebuild and got it back on the tractor and did mt first start today.... There is oil coming out of the crankcase breather. I double checked and the breather is reassembled correctly. Is this normal after a rebuild or is there something wrong? Thanks for the help....
 

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Could be the valve guides are worn. With new rings you have more compression and also more pressure in the crank case forcing it up past the valves.
 
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