Part Number: 710-815407Q 5
Quicksilver 815407Q5 Distributor Cap Kit
Keep your ignition system firing clean and consistent with the Quicksilver 815407Q5 Distributor Cap Kit. Designed as a genuine OEM replacement for Mercury MerCruiser engines, this kit restores proper spark distribution and helps eliminate misfires, hesitation, and rough idle—common signs of worn ignition components.
Built specifically for GM-based V6 marine engines with Thunderbolt IV and V HEI ignition systems, this cap and rotor set ensures accurate timing and reliable spark delivery across all cylinders. It’s a direct-fit replacement that installs easily and brings your engine back to smooth, dependable operation.
Constructed from a high-strength composite designed to resist heat and warping, the cap features corrosion-resistant brass terminals for long-lasting electrical performance. The included rotor is engineered for durability and stable spark transfer, even in high-vibration marine environments.
Common Engine & Boat Fitments
The 815407Q5 kit is used on GM-based 4.3L V6 MerCruiser engines equipped with Thunderbolt ignition systems. These engines are widely found in mid-size runabouts, bowriders, and sport boats, including:
- Sea Ray 180 Bowrider, 185 Sport, and 200 Select
- Bayliner 175, 185, and 195 series
- Chaparral 180 SSi, 190 SSi, and 204 SSi
- Four Winns Horizon 180, 190, and 200
- Rinker Captiva 186 and 192
- Larson LXI and SEi series
This ignition setup is also used on select Indmar-powered crossover applications, making it compatible with some Supra and Moomba models running GM-based 4.3L engines with similar ignition configurations.
Fitment varies by engine serial number and ignition type, so confirming compatibility with part number 815407Q5 is recommended before ordering.
Key Features
- Genuine Quicksilver OEM distributor cap and rotor kit
- Designed for GM-based 4.3L V6 engines with Thunderbolt IV & V ignition
- Restores consistent spark and smooth engine operation
- Brass terminals resist corrosion and electrical wear
- Durable construction built for marine conditions
If your engine is showing signs of inconsistent ignition or rough performance, replacing the cap and rotor is one of the simplest and most effective fixes. The Quicksilver 815407Q5 kit delivers factory-correct fitment and reliable performance, helping your boat start easier and run the way it should every time you head out.