Thanks,
John Dillman
John,
The starter numbers are the same (728C).
The generators are close: (927-F on the Model B and 927-L for the Model 43) Note that the 927-F is used on the Model 42 as well.
I’d guess you could use the water pump okay as long as it matches up well with the water inlet to the waterjacket.
Good luck!
Bill