The starter is likely going to hit the steel frame of the generator ( this is across the board all generators in this class )
A 212 crankshaft is a stroker crank and its most likely got a different taper.
A 208 uses a standard stroke crank and it could go one way or the other.
A 196 is a standard engine.
Crank shafts are the difference, they all physically in each others blocks but they are not functionally the same.
The taper is the difference.
The simplest way I can tell you to check your new electric flywheel is the same as your old one is to put a coin in the hole.
Does it line up in the same place, if the taper is different you will see it.
Most generators have holes cast in the block for the starter and electric kit ( if equipped with charge coils and flywheel internal magnets.
But these probably are not tapped so you will need a metric tap ( 6mm I think coarse )
60363, 69720 have different taper 69730 is an earlier predator also a different taper,
Kohler engines all have the same taper.
This will probably work on all of them.
Check with a coin to compare.
Double check by cleaning the flywheel and crank and remove key.
A dab of valve grinding compound and seat the two together.
You should see more than 50% contact ( its not tight under tension its much fuller contact. )
If you have good contact proceed to lap it a bit more more and try to get it as little better.
Throw away flywheel key after a good lapping you won’t needed.
Look up how to time a clone and set timing at 25 btdc
Since this is a woodgas project ( most likely ) drop by your Honda dealer and see about the GX160 heads try and buy a used one or search scrap yards, or online.
You may was well optimize the engine for woodgas now that its apart…
There sometimes are issues with dowel pin from one head to another.
You can drill the head and or block to make these comparable.
Or you can just carefully assemble without any pins.
The pins are there to speed up assembly at the factory and serve no real function except to confuse and frustrate you.
Now your engine will burn premium and wood gas and crank electric or pull start.
I hope this helps.
automatic choke parts from the Kohler mower engines can be adapted to these engines.
Most lawnmowers use one of the other of these and they can be adapted to a clone generator.
This is early XT-6 ( i like this one )
This is the simplified current version
Its a big block.
Goofy valve cover so its a canted valve Chinese hemi of some type.
No better or worse than an inline valve engine just a little harder to work on for whats mostly a cosmetic difference from a Honda.
This is just a sugestion but you should have a remote start stop and not try and make an automatic start stop.
One requires you to pay attention to when and how long it runs and the other requires you to pay attention anyways because it might develop a problem and its questionable as to what might be going on unless you make a very substantial set of safety circuits to govern how it runs.
I think the latter is more trouble than its worth unless you know exactly what you want and how to build it. ( also the costs of things like Murphy switches, timers ect ect…