I was a bit surprisd to find this familiar device in my lawn mower. (Kohler 14 hp)
According to the book it is a 3amp 35vdc (open ckt @ 3500rpm)alternator. Wired single phase.
18 coils with (I believe) 13 wraps of 16awg over laminated cores.
These magnets are kind of different in that they are magnetized with the ends being the same pole and the middle the opposite one. (-NSN-SNS-NSN-SNS-NSN-SNS-) Making 18 coils on 18 poles.
Might be able to turn it into something useful when the engine goes TU.