Quicksilver QL78V spark plug is a genuine marine spark plug for selected Mercury outboard engines and MerCruiser engines that specify QL78V or Mercury part number 896329838. The supplied spark plug bears the Champion designation QL78V and is intended for the engine's ignition system.
The spark plug is designed with M14 x 1.25 threads, 12.7 mm reach, gasket seat, and a 13/16″ hex. The noise-suppressing Q-construction features low-resistance inductive suppression, which reduces radio frequency interference, while the copper core contributes to efficient heat conduction.
Documented applications include MerCruiser 165 hp 3.7L, 170 hp, 180 hp 3.7L/LX, and 190 hp from serial number 6916779, as well as selected Mercury engines from 4 hp to 90 hp. Compatibility depends on model and serial number, and the engine parts catalog must therefore be checked before ordering.
Part number 33-896329838 replaces the documented Mercury numbers 33-838, 838, 33-75739, 75739, 33-14103570, 14103570, 33-14103Q, and 14103Q. It also replaces NGK BUZHW-2 in relevant Mercury applications and is supplied individually.
Key featuresGenuine Quicksilver part
Spark plug designation: Champion QL78V
Thread: M14 x 1.25
Reach: 12.7 mm
Seat: Gasket
Hex: 13/16″
Copper core and inductive RFI suppression
For selected Mercury and MerCruiser engines
Always check model, serial number, and part number before purchase
