Regular maintenance is very important. Moreover, your mower and mower accessories will last much longer if they have a tune-up each year by a business that knows how to repair them properly.
Riding Mower/Zero Turn: Change engine oil, oil filter, air filter, pre-air filter, spark plugs, and fuel filter. Clean the engine cooling fins and mower deck. Check deck belts, bearings, and idlers, transmission belt and idlers, tire pressures, charging system, and battery. Lube all grease fittings, level mower deck, sharpen and balance mower blades.
Push Mower: Change engine oil, spark plug, and air filter. Clean engine cooling fins and mower deck. Check cables, check self propel, lube machine, sharpen and balance mower blades.