Whether you're a homeowner or commercial landscaper, routine maintenance is essential for extended engine life. If you are a homeowner make sure you change the oil and filter, replace the air filter, replace the fuel filter, and check or replace the spark plugs before the beginning of each mowing season. Larger frame garden tractors require hydraulic servicing at regular intervals. Always use fresh stabilized fuel to help avoid fuel system damage and always check your engine oil level before each use. At any signs of engine trouble, take your machine to an authorized service center ASAP, the problem will not go away on its own and will likely lead to a bigger problem ($$$).
Commercial landscapers, your routine maintenance is completely different. Change your engine oil and filter every 100 hours of use and top off oil as necessary. Check your air filter(s) every 25 hours of use and replace as needed. Check your spark plugs periodically and replace as needed. Check your fuel filter for debris, if dirty, replace, otherwise, replace once a season. Depending on the manufacturer, commercial zero turns require servicing the hydraulic pumps, with the first service usually being between 250 and 400 hours and then every 400 hours of use after that. This includes replacing the hydro filter(s) and replacing the hydraulic fluid. The more often you service the hydros, the longer life you will get from them. Also, be sure to grease the unit at regular intervals. Like above, always use fresh stabilized fuel to avoid fuel system damage and check your engine oil level before each use. At any signs of engine trouble, take your machine to an authorized service center ASAP, the problem will not go away on its own and will likely get worse.