you may be right, the cowl suite the engine date though, so I imagine this engine was original to the cowl and tank, as well as the carby.
I'm guessing, maybe, this base made it into the 75 production run, and originally looked abit likt the white one above, but with this base.
Then at some point, the starter has busted, and the owner has made modifications to fit an impulse starter, either becase they hafd one spoare, or prefer them.
Then eithter when they chucked it, or in the lead up, it was stripped for parts.
I imagine the alterations needed to the mower to fit an impulse to this would be to do away with the cowl, and use a peice of tin from the front starter mounts, to secure the top of the tank.
