Injector 879312003

Mercury/Quicksilver Injector 879312003

The Mercury/Quicksilver 879312003 is a genuine factory OEM fuel injector engineered to deliver precise fuel metering in a broad family of MerCruiser MPI (Multi-Port Injection) marine engines. As a direct replacement component produced by Mercury Marine — the parent company of the Quicksilver parts brand — this injector maintains the exact fit, form, and function of the original equipment, ensuring reliable engine performance and protecting your warranty.

This injector is compatible with a wide range of sterndrive, inboard, and ski/towsport applications, including 4.3L MPI Alpha/Bravo, 5.0L MPI Alpha/Bravo, 350 MAG MPI Alpha/Bravo, 377 MAG MPI Bravo, 5.7L MPI Ski, 5.7L MPI Towsport with Gen III, 5.7L MPI Horizon MIE, 6.2L MPI MIE, 6.2L MPI Horizon MIE, MX 6.2L MPI, 383 MAG Stroker, 383 MAG Stroker Bravo, 383 MAG Stroker Inboard, 385 Performance Tuned, 350 MPI Alpha, 350 MPI Crate, and numerous EC (Emission Controlled) variants across multiple serial number ranges.

Quicksilver is the premier supplier of Mercury Marine original equipment replacement parts and accessories. Purchasing this genuine OEM injector ensures compatibility verified against Mercury's factory diagrams spanning crate engines, re-manufactured engines, and Quicksilver-manufactured engine families including sterndrive and inboard gas engine lines.

Key Features

• Genuine Mercury Marine OEM fuel injector — not aftermarket
• Part number 879312003 — current production status
• 15 mm injector size
• Shipping weight: 0.09 lbs; dimensions approximately 3.00" L x 1.25" W x 2.25" H
• Compatible with 4.3L, 5.0L, 5.7L, 6.2L, and 6.3L MPI MerCruiser engine families
• Fits sterndrive, inboard, ski, towsport, and MIE (Marine Industrial Engine) configurations
• Fits multiple serial number ranges across crate, re-manufactured, and Quicksilver-manufactured engines
• Special order / non-stocked OEM part; typical lead time 4–10 business days
• GTIN/UPC: 745061817838