I don't know if you can ohm a starter either!
Its a 15.5 in my girlfriends mower. She bought it at Walmart at a discount, had been returned by original buyer. It has a year old mower battery in it from Tractor supply (her battery will start my Kohler M18 with no trouble). She says battery always goes dead. After other tests, including running a jumper to the + starter post, and also trying to jump start with the truck, the starter just can't push past the compression stroke (I think the battery is okay). Connections are clean, I added toothed washers at the battery posts. The starter is very hot. My bet is the starter is defective and has been progressively failing since new and now it's done? Just looking for a positive test before replacing the starter. I guess I could pull the starter and put 12 volts on it and see how it responds?