Outdrive & tach problems

[scook]

Got a little time to work on the outdrive. Most of the wires are corroded off, where they come out of the rubber boot going to the sensors, and the sensors have a fair amount of rust in em.

Anybody know if I can just pull new wires in using the old ones, or does the drive need to come off? It looks like the wires come out under water, so I'm a little concerned about getting a good seal. Any advice?

Thanks - Scott