TESTING THUNDERBOLT IV HEI IGNITION SYSTEM... How do I troubleshoot my Thunderbolt Ignition? Use a voltmeter when making these tests. Do not use a test light. Source: Mercury Marine Service Bulletin 92-11
TESTING THUNDERBOLT IV HEI IGNITION SYSTEM...
How do I troubleshoot my Thunderbolt Ignition?
Use a voltmeter when making these tests. Do not use a test light.
Source: Mercury Marine Service Bulletin 92-11
