I’ve heard of flywheels being switched around before with good results and that’s probably what happened to yours. Now you have a real Eltoish Johnnyrude! They crack easy if over torqued and possibly that’s what happened to your original one.
Here’s some pics of the flywheel on my ’40 4351 Ace. The number cast into it is 71D1545.
This motor never sparked either when I got it but cleaning/polishing the points and replacing the bad original cap with an Orange Drop got it running again.


