Web5 jan. 2024 · Testing Mercruiser 4.3 V-6 Thunderbolt 4 Ignition System 1-4-19 ShipShape Marine 5.84K subscribers Subscribe 7.3K views 4 years ago This is testing the complete Thunderbolt 4 … WebMerCruiser 4.3L V6 Ignition Amplifier Module V6-14 390-9355A2 15247A1 805361T1 Move your mouse over image or click to enlarge $ 300.00 -Free Shipping On ALL Orders …
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Web31 dec. 2005 · Joined Jan 12, 2003. 924 Posts. #2 · Dec 25, 2005 (Edited) Troubleshooting the Thunderbolt IV is pretty simple and can be done with just a test light and a spark tester on the dist end of the coil wire. First step is to disconnect the tach. (grey wire on the negative terminal of the coil) A faulty tach can short out the ign coil. Web20 nov. 2011 · CY 3375 7.4 MPI twin Tests for Thunderbolt Ignition: W/ignition key on AND BILGE WELL VENTILATED OF GAS FUMES!!! Check the kill switch first! #1 - Connect your voltmeter neg. lead to the engine ground and pos. lead to the white/red wire terminal at the dist. It should read 12 volts. dayton ohio to michigan
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