Well, lessee. That motor can be outrageously expensive to restore. Carburetor kit costs a mint. Will you be getting the boat? The remote control contains a shift switch that costs about $300 new. Looking at the other possibilities, you are getting a battery ignition system (not CD), that carb, if it is any good, a heavy duty electric shift lower unit, a voltage regulator, etc. etc.
Troulblesome? not really. It is pre-CD ignition, that’s good. 100hp electric shift is tough and was used on V8 stern drives. 4-barrel carb and reeds are a big improvement in gas mileage over older V-4 motors. No in-boat junction box. In other words, state of the art for it’s day