The Mercury-Mercruiser 350 MAG MPI is a 5.7L V8 multi-port fuel injection marine engine — one of the most popular sterndrives and inboard powerplants in recreational boating worldwide. The fuel pump and pressure regulator work together to maintain consistent fuel pressure to the MPI injection system. When the pump fails or the regulator drifts out of spec, you'll experience hard starts, rough idle, engine stalling at speed, fuel pressure drop under load, and in severe cases a no-start condition — leaving you stranded on the water. This brand-new aftermarket pressure fuel pump and regulator assembly is a direct replacement covering three Mercury-Mercruiser OEM cross-reference part numbers: 866170A01, 866169T01, and 892680.

✅ Direct-Fit Compatibility

• Mercury-Mercruiser Engine: 350 MAG MPI (5.7L V8 Multi-Port Injection)
• Suitable for sterndrives and inboard boats fitted with the Mercruiser 350 MAG MPI engine
• Direct replacement — no modifications required

🔧 Product Highlights

• 100% Brand New Aftermarket: Not rebuilt or refurbished — starts with a full service life
• Pump + Regulator Assembly: Replaces both the pressure fuel pump and fuel pressure regulator in a single part — restores correct fuel pressure to the MPI system
• OEM-Spec Fuel Pressure: Correct operating pressure for reliable MPI injection, smooth idle, and full power delivery at all throttle positions
• 3 OEM Cross-Reference Part Numbers: Covers 866170A01, 866169T01, and 892680 for confirmed fitment
• Keeps You on the Water: Restores dependable fuel delivery so your boat starts and runs reliably every time
• No Dealer Markup: OEM-equivalent quality at aftermarket pricing

📦 What's Included

• 1 × Pressure Fuel Pump and Regulator Assembly (866170A01)

🔑 Key Specs

• Part Numbers: 866170A01, 866169T01, 892680
• Engine: Mercury-Mercruiser 350 MAG MPI (5.7L V8)
• Injection Type: Multi-Port Injection (MPI)
• Condition: 100% New Aftermarket
• Application: Sterndrives and inboard boats

Please verify your engine serial number and existing part number before ordering. Contact us for fitment confirmation if needed.