Briggs & Stratton Powersmart 30473 Service And Repair Manual page 27

Ignition Spark Circuit
When the engine is running the 27V coil produces a voltage
that is present at the ignition module. When the magnet on
the flywheel (rotor) passes by the trigger coil, this trigger
voltage is sensed by the ignition module. When the ignition
module senses this trigger voltage, the module sends the
voltage from the 27V coil in a pulse to the ignition coil. The
ignition coil then creates a spark at the spark plug.
Figure 50
Ignition Winding
1. Remove the control panel.
2. Disconnect the 10-pin connector (Figure 50).
3. Check continuity between ground and the ignition
winding (A, Figure 51).
Figure 51
• If continuity is measured, the winding is good.
• If continuity is not measured, check connections
and retest. If there is still no continuity measured,
replace the wires.
4. Disconnect ignition winding.
5. Measure the resistance at the terminal (A, Figure 52).
Figure 52
•
•
•
Test Ignition Trigger Coil
1. Remove the control panel.
2. Disconnect the ten-pin connector (Figure 53).
A
Figure 53
If resistance is 0.40 - 0.55 Ω the coil is good.
If resistance is not to specifications, check wire
connections and retest.
If resisitance is still out of spec, replace coil.
A
27