Changing the air filter, spark plug and pre-filter. Boy, if you can find one of these you can’t go wrong. 8″ tilling depth, strong 5 hp horizontal engine, cast iron shaft and tranny housing, bronze ring gear and even holes in wheels for weights. Its a terrific tractor that I immensely enjoy. It rips up sod with light passes and once the soil is prepared for your garden, it goes through it year after year with no effort at all. here is some simple maintenance.