Quicksilver Distributor Cap & Rotor Kit (Thunderbolt IV & V HEI Ignition) 815407Q5

Maintain reliable ignition performance with the Quicksilver Distributor Cap & Rotor Kit 815407Q5. This genuine OEM replacement kit is designed for General Motors-based MerCruiser engines equipped with Thunderbolt IV and Thunderbolt V HEI ignition systems. Replacing a worn distributor cap and rotor at the recommended service interval helps ensure consistent spark delivery, reliable starting, smooth engine operation, and dependable performance on the water.

Compatible with the following:

• MerCruiser General Motors-based engines equipped with Thunderbolt V and IV HEI ignition systems

The distributor cap is manufactured from a durable blend of PBT and PET engineering plastics to provide excellent strength, stiffness, and resistance to heat-related warping. Solid brass terminal inserts help resist corrosion and electrical pitting, maintaining reliable electrical contact even in harsh marine environments. The cap is also designed to minimize radio frequency interference (RFI), helping reduce electrical noise that can affect onboard electronics.

The included rotor is engineered with a high strength-to-weight ratio for dependable performance under demanding operating conditions. Its durable construction helps resist thermal cracking while delivering consistent spark transfer to each cylinder. Replacing both the cap and rotor together helps restore ignition efficiency and reduce the risk of misfires caused by worn ignition components.

To confirm compatibility, contact our team with your engine serial number at (727) 596-5929 before ordering.