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Message: <blockquote data-quote="wmk0002" data-source="post: 485153" data-attributes="member: 13975">I wouldn't worry about pulling the driveshaft seal housing out unless you have water in the lower unit. The corrosion looks pretty light too. The lower unit on my Yamaha 30 has some light corrosion that looks somewhat similar, probably because it was run in brackish water in Louisiana. I bet lots of people who run in those areas don't both to flush their motors and as a result the corrosion build up on those few places where the water kinda pools and cant drain. I actually have my lower unit off right now and had some water in it so I just replaced the leaking driveshaft seals. Holds pressure better but still falls off hard when I take it to 10 psi and then settles in on about 5-6 psi. Hard to tell if its the shift shaft boot or the driveshaft seals as the area around the shift shaft is filled with gunk and debris. For $30 more dollars I can reseal them both so I will definitely be doing that soon.</blockquote>