3858966 Volvo Fuel Pipe | Genuine Used Part

🔧 Product Description

Genuine Volvo Penta 5.0L / 5.7L MPI Fuel Rail - Part Number: 3858966

A genuine used Volvo Penta fuel pipe or injector rail for selected GM-based 5.0L and 5.7L multipoint-injected petrol marine engines.

The rail supplies regulated fuel pressure to the engine's eight injectors and incorporates mounting positions for the fuel-pressure regulator, valve, cap and related hose connection.

⚙️ Key Features

• Genuine Volvo Penta V8 fuel rail

• Correct Volvo reference 3858966

• Supports eight fuel injectors

• Used with regulator 3858967 and clip 3858968

• Suits selected 5.0L and 5.7L EFI, Gi, GXi and OSi engines

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3858966 Volvo Penta V8 fuel-pipe reference

OEM / Related Numbers:

• 3858966

• MerCruiser related fuel rail: 8M0070997

• Fuel-pressure regulator: 3858967

• Pressure-regulator clip: 3858968

• Fuel valve: 3858971

• Cap: 3858972

• Regulator hose: 3858974

• Injector: 3858969

• Later injector: 21141691

• Injector O-ring kit: 3858981

• Injector retainer: 3858970

• Fuel-rail bolt: 3858973

Aftermarket / Verified Equivalents:

• MerCruiser / GM MPI fuel rail reference 8M0070997 where the complete intake specification matches

• Complete aftermarket 5.0L / 5.7L MPI intake assemblies incorporating replacement rail 3858966 / 8M0070997

• No verified standalone aftermarket rail with a separate manufacturer number

🚤 Compatibility

Commonly used on:

• Volvo Penta GM V8 multipoint fuel-injection systems

• Eight-injector 5.0L and 5.7L petrol engines

• Gi, GXi, OSi and EFI engine families

Typically suits:

• Engine models:

• Volvo Penta 5.0GiC-225-S

• Volvo Penta 5.0GiC-J

• Volvo Penta 5.0GiCE-225-S

• Volvo Penta 5.0GXi-B

• Volvo Penta 5.0GXi-BF

• Volvo Penta 5.0GXi-C

• Volvo Penta 5.0GXi-CF

• Volvo Penta 5.0GXi-D

• Volvo Penta 5.0GXi-E and EF

• Volvo Penta 5.0OSi-E and EF

• Volvo Penta 5.7Gi and GXi applications using rail 3858966

• Volvo Penta 5.7OSi-GF

• Volvo Penta V8-270-CE-A

• HP Range: Approximately 225HP - 320HP

• Engine Type: GM 5.0L and 5.7L V8 multipoint-injected petrol marine engine

• Year Range: Primarily late-1990s through mid-2000s

🔌 Function

The fuel rail stores and distributes regulated pressurised petrol equally to all eight injectors.

Common signs of failure:

• Petrol leaks around an injector seat

• Fuel-pressure regulator will not seal

• Rail is internally corroded or contaminated

• Engine runs lean under load

• Fuel pressure falls during acceleration

• Strong petrol smell in the engine compartment

• Injector retainers no longer fit securely

• Rail mounting tabs are cracked

📦 Condition

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated