Fixing Your Mercruiser Thunderbolt Ignition Module

In case your boat is seated at the pier and won't turn over, there's a good chance the mercruiser thunderbolt ignition module are at the heart of the problem. It's one of these parts that you never consider until the engine abruptly cuts out within the middle associated with a lake or even will not fire upward after a lengthy winter. These modules were the precious metal standard for Mercruiser engines for years, specifically the Thunderbolt IV and Sixth is v systems, and whilst they're generally bulletproof, they do ultimately get tired plus quit. ...

March 19, 2026 · 7 min · Moerman Macinnis