"MikeT" wrote in message
...
Not 100% sure, but if memory serves me right, the commercial is heavier
duty with larger water pump and heavier bearings. I had one of these for a
while from an earlier vintage and if I remember right, most other parts
were the same. Ran good!

Thanks Mike.

A couple of other people have said similar things along the lines of bigger
anodes for immersion in salt water more often and a stronger gearbox.

Upgraded bearings and such would sound more like it otherwise they would
have to re-tool a lot of the internal dimensions to fit heavier gearboxes
etc.

Garry