Paul is right on the reverse rotation deal. I was under the impression you were simply replacing the existing normal starter with a high torque version. Did I miss Something? One thing though, GM starters can be converted easily to spin the other way, GT can tell you how. Fords, not so easy, kindof a cluster **** to do those.
Learned that from Glenn a while ago, which is why my starters are still mounted normally!
To be perfectly honest though, and I've said this before, why top mount a boat starter? I get the feeling people think that the water will do damage, but how many of these things work and work and work, infallably, in say Buffalo NY when they're packed all around with melting snow in January in Ohio or New York, or in Florida or Oregon getting soaked with water from the street in the constant rain? They are mounted on the bottom on all cars you know......
These things have worked in conditions a jet boat cannot imagine, yet we feel the need to keep them dry. Why?
Leave well enough alone. The starters we have today have performed, IMO, extremely well given what extremes have been thrown at them, and have done so for what, 50 years or better? Using an automotive starter in a boat? I say no problem! Only run in the summer, gets not even 1/4 as wet as it normally would in daily street use, leave it alone!
Just my thoughts......
Ray
