So I have an old and tired K161 with an electric start. I picked up a K181 at the show but is a pull start. I swapped the flywheels and the cowling wont fit over the plate behind the flywheel. And the recoil tin has a smaller hole compared to the electric start. So if I swap the plates behind the flywheel does the crank shaft bearing come of to? Do I have to press this back in? Maybe I should just find a k181 elec start tin?