Remove the steering wheel, seat, pedals and other control mechanisms from your riding mower. Remove each piece with the appropriate socket, wrench or screwdriver.
Inspect the outer body of the mower. Locate the retaining screws or bolts holding the outer shell to the frame of the mower. Remove each of these fasteners. Lift off each piece of the shell as soon as it is disconnected.
Remove each of the engine parts. Start at the top of the engine and work your way down to the bottom. Remove the pieces one at a time. Dump any oil, fuel or other contaminant into a plastic container.
Place each engine part into a bucket of kerosene. Scrub each engine part with a small wire brush. Place each piece on a plastic tarp to dry before disposal.
Remove each of the wheels and suspension parts from your mower. Dispose of any grease or other contaminants from the suspension parts into a plastic container.
Disassemble the frame of the mower. Haul the load to the local recycling center for immediate disposal once all of the parts are dry.