Will 4hp crank fit 5hp

[vintagebriggs5hp]

Im pretty sure my crank is bent and have several 4hp flatheads around that are on lawnmowers. any chance that the 4 will fit the 5 flathead?

 

[Kevin Noah]

I wouldn't see why not. I put a 3 hp piston, rod and all in a 5 hp briggs and it ran like it should.