Per Manual 6909a model Wizard is a 1963/64 7 1/2 hp by Scott(McCulloch)
Probably not much different from Scott (McCulloch) version.
Parts as they say "are around" Sometimes surprisingly easy to find
online. Bail-O-Matic Scotts have TWO impellers and not too convenient
to service.
Scott (McCulloch) made Wizard outboards in late 1950's and early 1960's
then supplied Sears. It may be possible that aside from cosmetic changes
the Sears outboard made by Scott (McCulloch)share parts
Bear in mind that Sears outboards prior to 1965 were made by West Bend
and share -0- with the Scott (McCulloch) Interestingly West Bend
(Chrysler) became the Wizard supplier in 1965.
Good Luck
I recently picked a 1964 3.5 hp McCulloch made Wizard from my grandpa. MLM 6904B. Flywheel will not spin, took lower unit off. Gears are rusted but do not look too bad, they turn and whatnot. This leads me to believe the piston is seized? Still working at tearing it down with my spare time.
Stuck motors can be stuck pistons, stuck bearings, stuck gear case and
can range from easy thru impossible. Every stuck motor is different. It is
best to have a parts motor to source replacements. If you are lucky between
the two you will have enough to make one that runs and looks good without
excessive investment.
Proceed with care, take notes and pictures as you delve into problem. Treat it
as an exercise in patience between you and motor...first to lose temper
loses all.
Louis