Sorry, I meant engaged. If it moves aft when started then it should be just fine. Thanks guys. I just didn't remember if it should be engaged the whole time or not.
Yes. That is fine. The starter drive shaft is threaded with very coarse threads so that when the starter is engaged, the gear spins out to engage the flywheel and the speed of the engine plus the spring in the starter drive rotates the gear back in again. If it was lined up with the flywheel all the time, the starter gear would be spinning with the engine all the time. Can you imagine how fast that little gear would be spinning? It would fling apart in no time.
LOL. Leave it to you to actually DO the math.
Well lets see.
142 or so teeth on the flywheel doing say, 2000 rpm's X 12 tooth? gear being run by that.
I get 23,666.60 RPM's if the engine is doing 2000 RPM's
The armature would probably come out of there resembling something like a rail gun round.