Ignition System

Question 1

Magnetos

Answer 1

– Engine driven and uses a permanent magnet to
generate electrical current.
–Generates high voltage to jump a spark across the
spark plugs in each cylinder
–It continues to operate whenever the crankshaft is
rotating

Question 2

Dual Magnetos benefits

Answer 2

– Higher power output
– More efficient burning
– Safety in the event of magneto failure

Question 3

Ignition Switch controls

Answer 3

 OFF
- No magnetos are connected
 L
-Only the left magneto is connected
 R
- Only the right magneto is connected
 BOTH
- Both magnetos are connected
 START
- Both magnetos are connected
- Initiates an electric starter motor to rotate the crankshaft

Question 4

Ignition Switch caution

Answer 4

If the “Ground Wire” between the magneto and
Ignition Switch becomes disconnected or grounded, the engine could accidentally start if the propeller is moved with residual fuel in the cylinder and continue to run even when the switch is in the OFF position.

Question 5

Magneto Check

Answer 5

Max Drop – 150 RPM
Drop Difference – not more than 50 RPM

Question 6

Distributor

Answer 6

• Distributes electrical current from magnetos to the spark
  plugs
• Spark plugs in different cylinders received current at
  different times

Question 7

Starter System

Answer 7

• Electric starter motor
• Cranks the crankshaft to move the piston
  inside cylinders
• Starts the Otto cycle