Dissected Parts to an Internal Combustion Engine

Briggs and Stratton four-stroke engine

List of Dissected Parts from an Internal Combustion Engine for a Lawn Mower

The table belows lists the Bill of Materials for the Internal Combustion Engine for a lawn mower:

Internal Combustion Engine Bill of Materials

Part #	Part Name	Category	Function	Material(s)	Picture
1	Cover	Transmission Elements	Gear on pull string starts motor.	Stamped metal, plastic
2	Grill	Other	Keeps large objects out	Metal mesh
3	Throttle body	Motion Conversion Elements	Linkage when pulled lets gas into carburetor	Stamped metal
4	Choke	Motion Conversion Elements	Linkage when moved controls richness of gas in carburetor	Stamped metal
5	Cylinder head	Structural Components, Support Elements	Provides air path and combustion surface	Cast iron
6	Muffler/exhaust	Other	Lowers sound and temperature of exhaust gases	Stamped metal
7	Valve cover	Structural Components	Provides access and covers valve springs	Stamped metal
8	Spark plug and distributor	Input	Supplies spark to ignite combustion cycle	Stamped metal, copper wire, plastic
9	Ratchet starter	Motion Conversion Elements, Support Elements	Allows pull string to retract and engages in opposite direction	Stamped metal, cast iron
10	Flywheel	Support Elements, Transmission Elements	Cools engine, brakes engine, and helps start engine	Cast aluminum
11	Crank blade attachment	Support Elements	Connects crank shaft to blade output	Cast metal
12	Oil pan engine mount	Structural Components	Holds and supplies oil to engine and mounts engine to frame	Cast iron
13	Cam shaft	Transmission Elements	Moves with crank shaft to open and close valves	Plastic
14	Piston/Rod Assembly	Input	Provides power through four stroke combustion cycle	Forged steel, cast iron
15	Crankshaft	Output	Converts linear power to rotational power	Forged steel

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