A clearer image of the engine may be helpful too.
It looks like American, like an Elgin (Sears)... If it is a Kirby, id expect to see some form of Id on the engine. It also has some Villiers aspects, but unlikely.
Maybe take the Cowl off, if Jacks Outboard contact is unsuccessful in identifying it.
Good luck, I'm sure you'll get an answer here
A very Interesting machine:)
