1. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Chapter Objectives - Upon completion of this chapter you should be able to:
Explain theory of operation of ignition systems.
I.D. the components of an ignition system and understand the function of each.
Perform ignition system installations and adjustments.
Explain sparkplug identification and construction.
Explain the differences between a Magneto Ignition System and a Battery Coil Ignition System.
Troubleshoot common ignition system problems and perform common repairs.

2. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Battery Coil -VS- Magneto Ignition System
Battery Coil Ignition
Magneto Ignition

3. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Point gap effects spark timing and Voltage Magnitude
Condenser Absorbs current flow to reduce point arcing

4. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Electromagnetic Induction
The Coil is a Step up Transformer

5. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
The primary function of an ignition system is to:
Provide a properly timed spark in the combustion chamber of the engine that will ignite the air-fuel mixture from the carburetor.
Points open

6. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems

7. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Spark Plug ID
Ribs Prevent
Flashover

8. Small Engine Ignition Systems
Ch 9
Small Engine Ignition Systems
Gapping sparkplugs
Selecting proper plug reach

9. Small Power Equipment Cranking SystemsB M