Official Troybilt rear-tine tiller parts

How to fix your TroyBilt rear-tine tiller when its engine leaks oil or gas

Oil leaks from a tiller engine can be caused by a leaking head gasket, sump gasket or oil drain plug. A loose or cracked fuel line can leak gas. A failed seal on the carburetor can also leak gas.

If the engine leaks oil, check the head gasket and replace that gasket if it leaks oil. Check the sump gasket if oil is leaking from the bottom of the engine and replace the sump gasket if it leaks. Tighten or replace the oil drain plug if it's leaking.

If the engine leaks gas, move the tiller to a well-ventilated area and check the fuel line. Reconnect the fuel line if it's loose and replace the fuel line if it's cracked. If the fuel line is okay, check the carburetor. Rebuild the carburetor with new seals and gaskets if the carburetor leaks gas. Sometimes, it's easier to replace the carburetor than to rebuild it.

Frequently replaced parts in TroyBilt rear-tine tillers

• Clevis pins. The clevis pins are shear pins that couple the tines to the rotating tine shaft. A clevis pin is designed to shear off if the tines hit a fixed object during cultivation to prevent damage to the engine and other tiller components.
• Spark plug. The spark plug provides the ignition spark for the engine cylinder.
• Starter rope. The self-retracting starter rope coils around a spring-loaded pulley on the top of the crankshaft. The person operating the tiller pulls the starter rope, which rotates the spring-loaded pulley and spins the crankshaft to start the engine.
• Carburetor. The carburetor mixes air with fuel in the proper proportion to produce a combustible gas. That gas/air mixture is pulled into the cylinder where the piston compresses it and the spark plug ignites it.