I just cracked open my gear oil resiviors tonite and what a mess. The o rings were flattened, the oil was black as night and there was a fair amount of water that came out right before the oil drained. Thank God I have new oil and o rings. I was going to put my boat outside for the first time this year. But after I winterized it, fogged it, and then went to buy a waterproof tarp, straps etc, I said hell with it. Its getting the heated garage treatment again!! Thanks to the guys on here for the tips for the gear oil change and winterizing tips. 
