Well, I just posted about bilge pumps because my max 4 has been taking on water rather quickly. I checked all my bearings a couple rides ago and they were all tight. Today I went for a ride (mostly in deep water/mud and in the pond) I was floating for about an hour and the water was about an inch over the shift linkage. When I got back to my shop I pulled up on the dry concrete and water was quickly running out of the 2 back bearings. So if there tight what's usually the problem? I wonder why only the two back ones leak? Thakx... Norm...