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I am working on a 2006 Yamaha F40 that had a broken driveshaft. The shaft looked like it had corrosion or a bad spot that caused it to break about 12-14" from the water pump. The lower unit turned easily. The shaft bearing had .007 up and down end play. My question is should I shim the bearing to .007 end play or try to shim it for zero end play? Since it was working fine before the shaft broke, shimming to zero may cause the gears to mesh differently. Anyone have experience with this?