How to Build a Car with a Lawnmower Engine

Materials

Attach the lawnmower engine to the go-kart frame. Use bolts and nuts to secure the engine in place.
Install the wheels and tires. The wheels should be attached to the go-kart frame with bolts and nuts.
Install the steering wheel. The steering wheel should be attached to the go-kart frame with a bolt and nut.
Install the accelerator pedal. The accelerator pedal should be attached to the go-kart frame with a bolt and nut.
Install the brake pedal. The brake pedal should be attached to the go-kart frame with a bolt and nut.
Install the battery. The battery should be attached to the go-kart frame with bolts and nuts.
Wire the engine, steering wheel, accelerator pedal, brake pedal, and battery together. Use wire connectors to connect the wires together.
Test the car. Start the engine and make sure that the steering wheel, accelerator pedal, and brake pedal work properly.

Use a lawnmower engine that is powerful enough to power the car. A 5-horsepower engine is a good choice.
Use a go-kart frame that is strong enough to support the weight of the engine and the car.
Use wheels and tires that are large enough to provide good traction.
Use a steering wheel that is comfortable to grip.
Use an accelerator pedal that is easy to press.
Use a brake pedal that is easy to press.
Use a battery that is powerful enough to power the engine.
Wire the engine, steering wheel, accelerator pedal, brake pedal, and battery together correctly.
Test the car before driving it on the road.

Do not use a lawnmower engine that is too powerful for the car. A too-powerful engine can cause the car to become unstable and difficult to control.
Do not use a go-kart frame that is too weak to support the weight of the engine and the car. A too-weak frame can cause the car to collapse.
Do not use wheels and tires that are too small to provide good traction. Too-small wheels and tires can cause the car to lose control.
Do not use a steering wheel that is too small to grip comfortably. A too-small steering wheel can make it difficult to control the car.
Do not use an accelerator pedal that is too hard to press. A too-hard accelerator pedal can make it difficult to accelerate the car.
Do not use a brake pedal that is too hard to press. A too-hard brake pedal can make it difficult to stop the car.
Do not use a battery that is too weak to power the engine. A too-weak battery can cause the engine to stall.
Do not wire the engine, steering wheel, accelerator pedal, brake pedal, and battery together incorrectly. Incorrect wiring can cause the car to malfunction.
Do not test the car on the road before it is safe to do so. A car that is not safe to drive can cause serious injury or death.