The Sierra 18-5484-1 is a marine-grade electronic distributor engineered as a direct plug-in replacement for late model GM EST (Electronic Spark Timing) distributors and GM-style fuel injection system distributors. Built with an aluminum housing and a precision combination of a ball bearing and bushing, this distributor delivers optimal timing stability and long service life in demanding marine environments.
Featuring right-hand (conventional) rotation, this unit is designed for GM V8 engines displacing 262–454 cu. in. and 502 cu. in., excluding 384/409 and tall block engines. It meets or exceeds SAE J1171 marine ignition standards for safety and performance. The included steel gear is compatible with both flat tappet and hydraulic roller camshafts, and the high-signal-strength trigger ensures reliable spark delivery across the RPM range.
Key Features:
- Direct plug-in replacement for late model GM EST distributors and GM-style fuel injection system distributors
- Right-hand (conventional) rotation
- Aluminum housing construction for durability and corrosion resistance
- Ball bearing and bushing combination for optimal timing stability and long life
- Steel gear compatible with flat tappet and hydraulic roller cams
- High signal strength trigger for reliable ignition performance
- Meets or exceeds SAE J1171 marine ignition standards
- For use with GM V8 engines: 262–454 cu. in. & 502 cu. in. (except 384/409 and tall block engines)
Replaces: Mallory YLE624AV, Mallory 9-26700, Mercury/MerCruiser 805222A1, OMC 3850399, OMC 3857400, Volvo Penta 3857400, Volvo Penta 3857449, Sierra 18-5484, 9-26001, 9-26700
Package Includes:
- Electronic Distributor
- Distributor Cap (Sierra 18-5354)
- Rotor (Sierra 18-5405)
For optimal performance, pair with Sierra Ignition Coil 18-5443 and Tune-Up Kit 18-5281.
