How to Modify a Lawn Mower Engine
A racing lawn mower engine is a step-down from a car engine. You can find numerous styles and sizes and all types of internal combustion engines. Some engines use a 2-stroke or a 4-stroke - and a rotary internal combustion engine that operates a spinning blade, often together with a drive wheel or wheels. The design and creation of these unique engines call for creativity and a sense of adventure.
Items Needed:
- Engine
- Transmission ( right angle gear box)
- Centrifugal clutch
- Sprockets
- Front axle and spindles
- Rear axle and axle hanger
- Steering wheel
- Brake system
- Chain
- Electrical components
- Wheels, Tires and hubs
- Gas lever
- High endurance engine components
- Replace the flywheel that is heavy and made of cast iron. Cast iron is inexpensive but will break when operating at high speeds. The best flywheel that wears well under stress is a Billet Aluminum flywheel; they are lightweight making the mower faster while increasing engine response and high RPM.
- Balance the crankshaft. Like flywheels, crankshafts are also high stress pieces on the engine. The regular lawn mower was built for low speed. High speeds require a more refined balance, if not balanced the crankshaft will shake it is self-loose.
- Replace the piston rod. This high stress piece was built for low speeds and must be replaced with a Billet Aluminum piece. It is lightweight and high resistance to stress makes it a top-notch piece of equipment.
- Remove the governor. Removing the governor allows full advantage of the engines power. The oil pan must be removed, while locating the copper ring that the throttle passes through. You must use a Flathead screwdriver to remove it. Seal the hole with a bolt and O-Ring.