HEI Ignition Coil MerCruiser Thunderbolt IV & V6 4.3L, and V8, 5.0L and 5.7L, and Mercury - 300 Thunderbolt, Replaces 392-7803A4,392-805570A2 - WK-920-1040 - Walker:
> Designed for the professional technicians and meet or exceed OEM manufacturers specifications
> The primary winding of the ignition Coil is wound with a small Number of turns and has a small resistance, applying the battery to this Coil causes a sizable DC current to flow
> Manufactured to meet or exceed OEM standards and specifications
> Modern Coil designs produce voltage pulses up in the neighborhood of 40,000 volts from the interruption of the 12-volt power supplied by the battery
> Some modern engines have multiple ignition coils mounted directly on the spark plugs and instead of Single voltage pulses, they may under some engine conditions produce three voltage pulses
> HEI Ignition Coil MerCruiser Thunderbolt IV & V Replaces 392-7803A4,392-805570A2, with a high quality.
> We strive to provide new innovative products to meet the need of the rapidly changing world we live in.
> Our goal is to provide products made with the finest material and consistent and high quality processes.
> For Mercruiser Thunderbolt 4 & 5 Ignition systems.
Replaces:
- Mercury Marine 392-7803A4, 392-805570A2
- Crusader 37068
This coil is a perfect OEM replacement.
40,000 volt coil.