The clutch on my 90hp lower unit is bad. Naturely, it's a three dog clutch. Now I have to change the forward and reverse gears because they do not make or can't get a three dog clutch. I am interested to know if I can do this without taking it to a Tohatsu dealer. There's not a reputable Tohatsu guy near my hometown. Just trying to save a buck. My buddy is a boat motor mechanic, but only has the tools for Mercury, Yamaha, and OMC. Is this possible?