SEF-AUX7003 - Basic Small Engine Repair

Course Description

Students will gain skills needed to diagnose and repair 2 and 4 cycle engines such as those found in lawn mowers, weed eaters, chain saws, and leaf blowers.

Course Outline

1. Two Cycle Engine Theory

Utilize the Internet to locate the intake and compression stroke information of a two cycle engine.
Utilize the Internet to locate Power Exhaust Stroke information of a two cycle engine.
Use a computer or poster board to draw the mechanics of both strokes.
Bring a 2 cycle engine to class or utilize one in the lab. Use the engine to demonstrate and explain to the instructor how a two cycle engine operates.

2. Four Cycle Engine Theory

Utilize the Internet to locate information about the operation of a four cycle engine.
Bring a 4 cycle engine to class or utilize one in the lab to demonstrate its operation.

3. Fuel Systems for Small Engines

Gasoline - Unleaded is the best for engine life extension.
Ethanol - Use no more than 10%.
Specialty Fuels: Remember that the Reid Vapor Pressure must be determined before using any specialty fuel. Fuels with a rating of less then 50kPa (7psi) should not be used in the summer, and fuel with a rating of 85kPA (12psi) should not be used during winter.
Demonstrate the starting difference between using unleaded gasoline and a specialty fuel.

4. Trouble Shooting

Fuel System - Outline Steps you use in repairing the lab machine fuel system.*
Ignition System - Outline Steps you use in repairing the lab machine engine system.*
Basic Starter - Outline Steps you use in repairing the lab machine starter.*
*You may use your own machine.

5. Basic Maintenance

6. Final Project

Use your own machine or one in the shop to trouble shoot, diagnose and repair a fuel system, ignition system or basic starter of a 2 or 4 cycle engine machine.

Learner Outcomes

Student will be able to explain the 2 Cycle Theory of Engines.
Student will be able to explain the 4 Cycle Theory of Engines.
Student will be able to describe the fuel systems for small engines.
Student will be able to describe and utilize the steps to trouble shooting an engine problem.
Students will be able to complete basic maintenance on a 2 and 4 cycle engine.
Final project - trouble shoot, diagnose and repair a fuel system, ignition system or basic starter of a 2 or 4 cycle machine. (Your own or one in class)