MF 135 w/ Z145 Starting issues

[dubnali]

Been lurking, just haven't posted. I recently acquired a 135 with 4 cyl gas engine. When I got it, the starter would engage just enough to start as long as it started quickly. Otherwise, it would disengage very quickly. After reading, I assumed it was the starter drive getting weak so I just replaced it and the brushes as well. Now it won't engage the flywheel at all. Here's the kicker: on the tester at my local part store, the drive kicks in fully and tests good. I've swapped batteries, solenoids, even used a booster pack on the battery with no luck. The # on the Delco starter is 1107694. I have already ordered a reman starter ($50), but am worried it may not fix the issue. Any ideas?

 

[klancf51]

Broken teeth on flywheel ring gear?

 

[dubnali]

Sorry, forgot I posted here. It turns out it was tge wrong starter drive. I went by the part number on the housing instead of the actual part #. I had the whole starter rebuilt for $40 and it's been fine ever since.