Greetings, I have a 97 Merc 5.7L "new" longblock with a Thunderbolt V ignition with 60 hours on it that won't start. The spark is weak and the coil is out of specs from an ohm meter test per the specs in the Merc manual. The only place to get a coil for a boat on this island is from the NAPA dealer. NAPA shows part number 185438 (same part as Sierra) which lists the Thunderbolt as a direct application but they don't stock this part. NAPA also shows the Echlin IC88 as a direct replacement for the 185438. NAPA's web site doesn't show any marine application for the IC88. All they show are a bunch of foreign autos from the 70's, 80's and 90's.
Does anyone know if this coil will work with the Thunderbolt ignition?
Does anyone know if this coil will work with the Thunderbolt ignition?