Engine Components and Functions

Front

Intake Valve

Back

Allows air-fuel mixture to be drawn into the combustion chamber.

Front

Exhaust Valve

Back

A valve that permits the remains of the burned fuel to leave the combustion chamber.

Front

Piston

Back

Movable part in the cylinder forced into motion by explosion of fuel.

Front

Piston Rings

Back

Seal the combustion chamber, maintain pressure during combustion, and control oil consumption in an engine.

Front

Crankcase

Back

Houses the crankshaft and connects to the engine's oil supply, helping to support the engine's moving parts.

Front

Muffler

Back

Reduces noise from the engine's exhaust and directs exhaust gases out of the engine.

Front

Primer Bulb

Back

Helps start the engine by forcing fuel into the carburetor, making it easier to start.

Front

Head gasket

Back

A seal between the engine block and the cylinder head. It keeps the air and fuel mixture in the cylinders and prevents leaks of coolant and oil.

Front

Crankgear

Back

Part of the crankshaft system. It helps convert the up-and-down motion of the pistons into the circular motion needed to turn the engine.

Front

Carburetor

Back

A part of a small engine that mixes air and fuel. It helps create the right mixture for combustion.