Differences from 30B to C are emissions and cowl.
This would make sense, with emission changes and the newer Cowlings looking "Etec" like (but hopefully not brittle like their early models)
Tohatsu rep told me they are using part through from 2009 to 2021, but Id like further clarification, just so I know I am never going to be left high and dry with parts etc. Id have thought Tohatsu who are making a lot of the MErc 2 stroke stuff may even be doing so for the 4 strokes? (not sure, just a thought).
Yamaha seemed to have used a lot of its 2 stroke components in the mid range 4s, so much so the F25 weighs very little more. Honda have only ever made 4s, so Id think of the 2 brands with big parts availability (new or used) in the world, these 2 would be the two largest?
Thanks for your thoughts.