The starter location isnt adjustable BUTTTTTTTTT the flywheels location on the crankshaft (end play runout) is !!!!!!!!!!!!
Two cylinder Deeres often end up in the same location after shut down and if the flywheels ring gear teeth get worn its possible to relocate the gear so shes startign where the teeth arent so worn.
Also the starters drive mechanism may have some problems that the drive gear isnt extending as far outward as it should.
Excess flywheel end play run out or a faulty starter drive are my guesses