27 SERVICE AIR FILTER & PRE-CLEANER - 18.5 & 21 HP ENGINES NOTE: Air filter configuration may differ from shown. Consult engine manual for further information. Interval: Pre-Cleaner: Every 25 hours or as required. Air Filter: Every 50 hours or as required. Replacement Interval: Pre-Cleaner: As required. Air Filter: Every 200 hours or once per season. Air Filter Removal & Installation 1. Lift up on the bottom of the latch (A, Figure 37 or 38) and flip the latch away from the cover. 2. Remove the

• Fill the fuel tank with fresh fuel. FUEL RECOMMENDATIONS For daily operation: Use only unleaded gasoline with a pump sticker octane rating of 87 or higher. Gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by volume) is approved as a fuel. Methyl Teriary Butyl Ether (MTBE) and unleaded gasoline blends (up to a maximum of 15% MTBE by volume) are approved as a fuel. Do not use unapproved gasolines, such as E85. Do not mix oil in gasoline or modify the engine to run on alternate fuels. This

No. Description 7800611 Simplicity Axion Model ZT18533, 18.5HP w/ 33” Mower 7800616 Simplicity Axion Model CZT18533, 18.5HP w/ 33” Mower (California Model) 7800620 Snapper 150Z Model SC18533, 18.5HP w/ 33” Mower 7800625 Snapper 150Z Model CSC18533, 18.5HP w/ 33” Mower (California Model) 7800612 Simplicity Axion Model ZT2142, 21HP w/ 42” Mower 7800617 Simplicity Axion Model CZT2142, 21HP w/ 42” Mower (California Model) 7800615 Simplicity Axion Model ZT2142, 21HP w/ 42” Mower (Australia Model) 780