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    Ignition Coil Failure 1997 Merc 5.7 Thunderbolt V

    Hi Rick, I was wondering if you ever got to the bottom of your coil issue, I'm having a similar issue with a 454 Mag thunderbolt V ignition. The coil I replaced heats up and fails but once it cools off, I'm back in business for another 10 minutes under load. The new coil lasted 30 minutes @3200...
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    Cooling system clogged.

    Hello. Some great information here. Thanks! Question, I suspect a blocked oil/PS cooler after eating a raw water pump impeller. Merc 454 MAG Gen V w/ a Bravo I outdrive. I backflushed and caught some of the impeller pieces with a stocking. While I get flow backflushing, I get no flow in the...
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