Standard

Posted: 06/16/08

£ State Standard

R Institutionally Developed

College: Griffin Technical College

LER 100 4 - Cycle Engines

Course Description

Introduction to basic four-stroke engine operation. Topics include: Lawn Equipment four-stroke engine fundamentals, electrical/ignition systems, governor systems, fuel systems, and precision measuring.

Competency Areas	Hours
Safety	Class	2
Four-Stroke Engine Fundamentals	D. Lab	6
Precision Measuring	P. Lab/O.B.I.	0
Electrical Systems and Diagnosis	Credit	5
Fuel Systems and Diagnosis

Prerequisite:	Program admission
Corequisite:

Course Guide

Competency	After completing this section, the student will:	Hours
		Class	D.Lab	P.Lab/O.B.I.
Safety		1	3	0
Safe practices	Demonstrate knowledge of lawn equipment, small engine, and shop safe work practices.
Four-Stroke Engine Fundamentals		3	22	0
Operation	Explain the basic principles of four-stroke internal combustion engine operation.
Identification	Identify types of L-head and OHV engines.
Service procedures	Diagnose, inspect, repair and R & R engine block assemblies, crankshafts, rod and piston assemblies, cylinder heads, valve systems, internal governor components and bearings and seals.
Precision Measuring		2	5	0
Measuring equipment	Use precision measuring tools to determine the need for boring, sleeving, or replacing cylinder head components.
Electrical Systems and Diagnosis		8	11	0
Electrical theory	Explain basic electrical theory.
DC and AC circuits	Explain DC and AC circuits and describe their differences.
Magnetism	Explain the basic principles of magnetism.
Components	Locate and identify electrical circuit components.
Ohm's law	Define Ohm’s Law and the relationship among voltage, amperage, and resistance.
Series and parallel circuits	Describe a series and a parallel circuit.
Analysis	Analyze circuit problems using Ohm’s Law.
Meters	Identify types of analog and digital meters used in small engine electrical servicing.
Operation	Set up and use digital voltmeters, ammeters, and ohmmeters.
Application	Diagnose circuit problems using continuity and voltmeters to record voltage drop. Troubleshoot ignition system using spark tester and DMM.
Fuel Systems and Diagnosis		6	19	0
Carburetors	Identify the major types of four cycle carburetors and carburetor components and explain their operation.
Governor Systems	Describe governor operation in four cycle engines.
Four cycle fuel systems	Explain four cycle carburetor theory and operation.
Carburetor circuits	Identify Components and explain carburetor metering circuits operation.
Carburetor systems	Perform diagnostic checks to verify proper four cycle carburetor system operation. (Re-kit carburetors)
Fuel condition	Identify contaminated fuel.

Suggested Resources

Roth, A. (2003) Small Gas Engines: Fundamentals, Service, Troubleshooting, Repair, Applications. ISBN 1-59070-183-6. Tinley Park, IL: Goodheart-Willcox.

Roth, A. (2003) Small Gas Engines: Fundamentals, Service, Troubleshooting, Repair, Applications Workbook. ISBN 1-59070-184-4. Tinley Park, IL: Goodheart-Willcox.

Radcliff, R., Roark. D. (2003) Small Engines 2^nd Edition (Briggs and Stratten). ISBN 0-8269-0012-7. Homewood, Ill: American Technical Publishers

Radcliff, R., Roark. D. (2003) Small Engines 2^nd Edition (Briggs and Stratten). ISBN 978-0-8269-013-5. Homewood, Ill: American Technical Publishers.

Posted: 06/16/08