SAE #0 Rubber Block Drive The customer had said it had a bad oil cooler while out fishing and was full of water and he drained gallons out. Says he put new oil in and came home. When shop looked at the gear although there was a little rust on some surfaces, they saw no current signs of water and the oil cooler tested good. Because the customer runs a first class operation shop removed the gear from the boat, split the cases and looked inside the gear and saw a small spot of flaking on one of the pinions. Everything else inside the gear looked good.