Change Interval in Hours. 10. AM125424. Engine Oil Filter. 1. Every 25 Hours. 2. TY22076. 2 1/2 Gal. Engine Oil. Turf Gard ® 10W30. 2.0 qt. Every 25 Hours. 10. AM116304 or. AM107314. Fuel Filter. 1. Every 25 Hours. 20. M78543. Spark Plug. 2. Every 25 Hours. 2. GX20305. Belt - Mower deck. 1. 100/200. read more