What type of starter does it have and where?

@hwggiese the ZTS comes with either a Kohler or a Briggs and Stratton engine. So you will have to give us more details on that. On both types the starter is held to the engine with 2 bolts that are near the top of the starter. Remove those 2 screws on the starter and then remove the nut that secures the power wire to the starter then remove the starter. On some engines there will be a little cover over the top of the starter that must be removed in order to access the starter bolts. So we need more info to point the starter out to you