Briggs & Stratton — Check Ignition (With Engine Starter)
Testing & diagnosis · Ignition system
From a Briggs & Stratton service manual — check it applies to your exact model before use.
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Before you start
- Be sure there is no fuel or fuel vapor present, which might be ignited by the spark and cause a fire or explosion.
Procedure
- Be sure there is no fuel or fuel vapor present.
- Attach a #19368 tester to each spark plug lead and ground the other end to the engine block.
- With spark plugs installed, spin the flywheel with the engine starter.
- If spark jumps the 4.2 mm (.166") tester gaps, the ignition system is performing satisfactorily.
Tools required
- Tool #19368 ignition tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Test gap 4.2 mm (.166")
Source: Briggs & Stratton service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.