Dirk - Welcome to the site!! Just a heads up on the pre saltwater series yamaha's (before 93) in case you're not aware of this issue already. They are great motors . . . but the shift shafts will fail from corrosion. If you start having problems getting in and out of gear . . . this is where to look. Also check the battery harness for hard spots.
common problems with the v20 are drain plugs in the floor, fuel fill and vent hoses, and the plastic rod rack inserts. Everything else seems to hold up really well.