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AUX7003

Course
AUX7003
Course Title
Basic Small Engine Repair

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.

Objectives

  • 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.

Content

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.

Prerequisites

  • None

Method of Instruction

  • Hand-on

Evaluation

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)