Sierra 18-5273 Mercruiser Tune Up Kit for V8 Thunderbolt HEI Ignitions  Sierra high-quality engine parts are designed to meet OEM specifications. Fits GM V-8 engines with Thunderbolt IV & V...

Cap & Rotor Kit, Mercury - Mercruiser 805759T-3 Fits GM V-8 engines with Thunderbolt IV and V HEI ignitions Replaces: GLM 71780 Mallory 9-29350 Sierra 18-5273 Mercury 805759Q-3

Mercruiser Distributor Cap V8 Thunderbolt Ignition by Sierra Includes Gasket Replaces: Mercrusier 16457A4,805759T2,805759T1, 805759A5,80759A2,43557A1,805759A1,90746A1,43557 Mallory 9-29403 GLM ...

Ignition Sensor Assembly, Mercury - Mercruiser 87-892150Q02 For: V-6 & V-8 with Thunderbolt ignition (1981-1997) nut or bullet...

Sierra 18-5431 Mercruiser V8 Rotor Assembly Sierra high-quality engine parts are designed to meet OEM specifications. Fits GM V-8 Engines with Thunderbolt IV & V Ignition. Interchangeable...

Sierra Ignition Sensor Kit for Mercruiser For: V-6 & V-8 with Thunderbolt ignition (1981-1997) nut connectors. Replaces: Mercury 87-892150Q02, 87-892150K02  Mercruiser 87-861780A2,...

Ignition Coil for Thunderbolt Mercruiser & Crusader Ignitions Replaces: Crusader 37068 Mercury 392-805570A2, 392-7803A4, 392-7803, 3000-8M0079202, 392-805570A1 Mallory 9-29701 GLM 72115 ...

NGK Spark Plugs

Mercruiser Tune Up Kit for V6 Thunderbolt HEI Ignitions Kit Includes: Rotor 18-5432 Distributor Cap 18-5396 Gasket  Replaces: Mercury 815407Q 5, 815407T5 Pro Marine 64407K GLM 71790...