The 7.5 is a fairly old motor
throttle assemblies with the control cables
and harness are typically pretty pricey... IIRC, to do this with a Yamaha 9.9 a few years ago was around a grand (new from the MFG).
You may find it is impossible or nearly so to source controls for the motor you have, and even if you do you may spend a lot of money
I have sailed boats with the outboard
in a well and remote
controls. I did not like the set up at all. Reaching over the transom is something of a pain, but if you do not have too far to reach I would suggest living with the motor for a while and see if you get used to it. Obviously it is workable on some level.
If you buy a new motor it will likely be a 4 stroke
. If you follow the crowd, you will 'upgrade' to a 9.9 and probably double your weight hanging off the transom. Bad all the way around.
Take your time, and see what the current
set up has going for it and it's weakness. You may decide to skip the control/motor upgrade all together and install an inboard or something like one of those new e-pod electric
motors. You will never get the money back out of the new outboard if you do.