may i just add ,
the boat must be in water to load up the cable when you shift. thats how it works the switch.
i had the same thing when i put the new engine in mine
when out it will shift ok.
get a good marker pen to dot cable to start with.
take out split pin. turn 1/2 one way and try .if not put back to dot
and back off 1/2 try.you may have to turn more than 1/2.
is can be a pain to setup.
or get the cable of the carb get a mate to drop it into rev for you then you can try to rev it up.
if you are stuck i got the old type switch the hard to get one. :wink: