| Every 50 hours | Air Filter | Depends on which air cleaner is fitted. Oil bath: check the oil level in the reservoir cup every 8 hours and service/replace the foam filter every 50 hours. Quad-Clean: service/replace the precleaner every 50 hours or annually and replace the element every 200 hours. Low-profile: clean the element every 100 hours or annually and replace it every 300 hours. Service more often under severe, dusty or dirty conditions. |
| Every 100 hours | Engine Oil | Change the engine oil every 100 hours or annually, whichever comes first. Kohler authorizes a 300 hour interval ONLY when using KOHLER PRO 10W-50 oil; with any other oil the interval is 100 hours. There is also a first oil change after the first 5 hours, which is not required if the engine is filled with KOHLER PRO 10W-50 full synthetic. Oil must be API service class SJ or higher; 5W-30, 10W-30 or SAE 30 by air temperature. Capacity 0.63 U.S. qt (0.60 L). This engine has no oil filter. |
| Every 300 hours | Fuel Filter | Every 300 hours: check the fuel filters - the tank outlet filter and the in-line filter - and clean or replace them if needed (if equipped). Kohler lists this as a check, not a scheduled replacement. |
| Every 300 hours | Valve Clearance | Check and adjust the valve clearance every 300 hours, with the engine cold. Kohler marks this as a job for an authorized dealer. |
| Every 500 hours | Spark Plug | Replace the spark plug and set the gap every 500 hours or annually, whichever comes first. Gap 0.030 in. (0.76 mm). The OEM part number is not stated in the owner manual. |