How to remove shaft rusted in engine, 1984, 6hp, E6RCRM

[GAUDIANO0262]

What is the factory-taught way to remove a shaft that is rusted to the powerhead at the spline interface of the engine?

Are there any non-factory ways that a shaft was actually removed without damaging the powerhead?

Has anyone cut off the shaft at the spline interface to make it a short stub, used a tap drill for a grease fitting, drilled the end of the stub to its end at the crankshaft end, threaded the drilled hole for and installed a grease fitting, then used pressure from a grease gun to hopefully swell the female spline slightly, perhaps also lubricate the spline grooves, and push the stub out?

[boats.net]

There is no factory taught way, Evinrude teaches to service and grease on regular basis.
Take it to a welding shop and let them make a slide hammer out of shaft thats left, they should be able to get it out.

[GAUDIANO0262]

Removal of splined shaft rusted in power head, 6hp 1984

Quick heat was applied to female spline and a knocker used to pull on shaft. Shaft seal of course was destroyed. Getting the remainder of the steel part of the seal out was very difficult as there was little to grasp. Had to peel steel part around the perimeter inward with a tiny chisel. Whole operation not for the faint of heart if its your cherished motor.