21758827 Cable Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Alternator Bonding and Earthing Cable Kit - Part Number: 21758827

A genuine Volvo Penta electrical bonding kit used on selected later-production D4 and D6 common-rail marine engines. The kit provides a low-resistance earth path between the alternator and engine structure, helping stabilise charging voltage and protect the EVC and engine-management circuits from poor grounding.

⚙️ Key Features

• Genuine alternator bonding-cable service package

• Matched cable length and terminal orientation for the engine installation

• Includes the specified toothed washer and flange screw

• Helps prevent voltage drop, erratic charging and electronic faults

• Designed for the applicable later D4/D6 electrical arrangement

📋 Kit Contents

• Bonding cable assembly - Volvo Penta 21758821

• Toothed lock washer - Volvo Penta 942767

• Flange screw - Volvo Penta 984734

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21758827 current Volvo Penta cable-kit reference

OEM / Related Numbers:

• 21758821 - included bonding cable

• 942767 - included toothed washer

• 984734 - included flange screw

• Applicable alternator, starter and engine harness numbers remain engine-build specific

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Alternator-to-engine earth and bonding connections

• Later EVC-equipped D4 and D6 marine diesel electrical systems

Typically suits:

• Engine / drive models:

• Volvo Penta D4-225I-F

• Volvo Penta D6-300A-F

• Related D4-F and D6-F installations only where cable kit 21758827 is shown in the serial-numbered electrical or fuel-system diagram

• HP Range: Approximately 225HP-300HP for the directly confirmed applications

• Engine Type: Volvo Penta inline 4-cylinder and inline 6-cylinder common-rail marine diesel

• Year Range: Approximately 2010s

• Serial Range: Engine wiring-harness, alternator and production-build controlled; verify the engine serial because not every D4-F or D6-F uses the same bonding arrangement

🔌 Function

The cable provides a dedicated electrical return path from the alternator to the engine, reducing resistance and ensuring the charging and EVC systems share a stable ground reference.

Common signs of failure:

• Charging voltage is low or unstable

• Alternator or EVC faults appear intermittently

• Cable terminals become hot or discoloured

• Green corrosion develops beneath the insulation or terminals

• Continuity testing shows excessive resistance between alternator and engine ground

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging