Just like part # for gear case ,just nice to be able to look up part# in case something breaksJust use the 20 HP model for parts .-----Or the 66 model or the 68 model.-----What parts are you looking for ???
Ok great! That helps narrow it down, never encountered not being able to find parts diagrams, thanks everyone!The 20 Johnson has the exact same gearcase.----Painted white instead of blue like the 18 Evinrude.