Sierra 118-5484-1 Electronic HEI Distributor for GM V8 Marine Engines

The Sierra 118-5484-1 is an electronic HEI distributor designed as a direct replacement for late model GM EST (Electronic Spark Timing) distributors used in marine applications. This distributor fits GM V8 engines from 262 to 454 cubic inches, plus 502 engines, except 348/409 and tall block configurations.

Key Features:

• Aluminum housing construction for durability and corrosion resistance
• Meets or exceeds SAE J1171 industry standards
• Includes steel gear compatible with flat tappet or hydraulic roller cams
• Reliable high signal strength trigger system
• Ball bearing and bushing combination provides maximum timing stability and long life
• 1.24-inch shaft diameter
• Conventional right-hand rotation

This distributor replaces Mallory YLE624AV and Mercury 805222A1. The kit contains a distributor cap (part #18-5354) and rotor (part #18-5405), providing a complete plug-and-play replacement solution for GM-style fuel injection system distributors in marine engines.