Title: Describe the types, purpose, function, and common terminology of four-stroke air-cooled engine components.
Course: Small Engine Technology I (20110-I) > Section: Understanding Four-Stroke Engine Operation Theory and Components

Description should include an explanation of

- engine block, crankcase, and cylinder
- piston, piston pin, and piston rings
- connecting rod and cap
- crankshaft
- engine bearing types
- oil seal types
- cylinder head
- valve train
- camshaft
- automatic compression release (ACR) mechanism
- lifters/tappets
- mechanical governor components
- flywheel.

Process/Skill Questions:

- What types of piston rings are commonly found on four-stroke, air-cooled small engines?
- What are the different types of valve retainers?
- What does the ACR mechanism make easier?
- What is the purpose of the flywheel?
- What component is referred to as the oil dipper?
- What purpose do the fins have on the engine block and cylinder head?
- What component has a lobe?