Briggs & Stratton 30473 Ignition Winding, Test Ignition Trigger Coil

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.

4. Disconnect ignition winding.

5. Measure the resistance at the terminal (A, Figure 52).

					A
				Figure 52
				•	If resistance is 0.40 - 0.55 Ω the coil is good.
Figure 50				•	If resistance is not to specifications, check wire
					connections and retest.
Ignition Winding				•	If resisitance is still out of spec, replace coil.
1. Remove the control panel.
2. Disconnect the 10-pin connector (Figure 50).
3. Check continuity between ground and he ignition
winding (A, Figure 51).
Not				Test Ignition Trigger Coil
				1. Remove the control panel.
				2. Disconnect the ten-pin connector (Figure 53).
	for		Reproduction
		A
Figure 51

•	If continuity is measured, the winding is good.
•	If continuity is not measured, check connections	Figure 53
	and retest. If there is still no continuity measured,
	replace the wires.

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