Sierra 18-5313-1 GM V8 Point Type Marine Distributor for OMC, MerCruiser & Crusader

The Sierra 18-5313-1 is a contact-controlled, breaker point type marine distributor engineered for GM V-8 small block and big block engines used in inboard and sterndrive marine applications. It is a direct replacement for the Mallory YL Series distributor and meets SAE J1171 certification standards for marine use. The unit ships complete with a mounting gasket.

Key Features:

• Contact-controlled ignition for reliable spark delivery on GM V-8 engines
• Stabilized points eliminate point float and bounce for consistent performance
• High dielectric condenser with brass case resists corrosion in harsh marine environments
• Mylar insulation provides greater protection against current leaks and shorting
• Super duty cap and rotor included for long-lasting durability
• Self-lubricating bushings reduce maintenance requirements
• Standard rotation — compatible with most GM V-8 small and big block engines (not for 348, 409, or tall deck big block applications)
• SAE J1171 certified for marine ignition applications

OEM Cross-Reference / Replaces:

• Mallory: YL624AV, YL624MW, YL624MV
• MerCruiser Stern Drive: 17177A1, 91823A3, 816148A1, 74905A3, 68521A4, 68521A3, 13447A1
• OMC: 985560
• Crusader: 37061
• Johnson/Evinrude: 985560
• Also replaces: 47-5313, AP892, 18-5313, 9-26105

Replacement / Service Parts:

• Tune-up kit: P/N 18-5251
• Tune-up kit with cap: P/N 18-5271
• Replacement cap: P/N 18-5376
• Replacement rotor: P/N 18-5404-1
• Replacement contact set: P/N 18-5314
• Replacement condenser: P/N 18-5338

Sierra marine parts are engineered to meet or exceed OEM specifications and are built to withstand the demanding conditions of the marine environment. Sierra supplies OEM engine manufacturers and boat builders with quality parts, making this distributor a trusted choice for marine ignition system service and restoration.