GS300L Ignition Unit/CDI Bad?

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  • splazoid
    • Jan 2026

    #1

    GS300L Ignition Unit/CDI Bad?

    Have a no-spark situation on a GS300L. Battery is new, coils have been replaced with known-good OEM units. New spark plugs. Checked all connections several times over. Still have no spark.

    Am I missing anything? Also, the manual I found basically has you diagnose the pickup coils, ignition coils, and battery. If those are all good but you still don't have spark, the service manual basically assumes you have a bad CDI Ignition Unit.

    Is there no way to test this ignition box? Anywhere I can get a replacement one?
  • Gorminrider
    Forum Sage
    Past Site Supporter
    • Aug 2012
    • 4803
    • British Columbia, Canada

    #2
    I'm in sort of a hurry but TRY this from shop manual available at Bass cliffs site

    ignition test.JPG

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