21165135 Spark Plug Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 3.0GXi Spark Plug Kit - Part Number: 21165135

A complete four-plug ignition service package for Volvo Penta 3.0GXi-J and 3.0GXiC-J petrol engines. The plugs have the correct heat range and marine-engine specification for the high-output four-cylinder fuel-injected engine.

Kit Contents:

• 4 x Volvo Penta marine spark plugs - supplied under kit 21165135

• Aftermarket replacement for each plug: NGK 7740

⚙️ Key Features

• Complete four-cylinder spark-plug service set

• Four spark plugs supplied

• Specified for 3.0GXi-J and 3.0GXiC-J

• Recommended plug gap: 0.050 inch / 1.27 mm

• Direct NGK aftermarket cross-reference available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21165135 current / original Volvo Penta spark-plug-kit reference

OEM / Related Numbers:

• 21165135

• NGK: 7740

• 3854260 related distributor cap

• 3854261 related distributor rotor

• 3888324 related ignition-wire kit

Aftermarket / Verified Equivalents:

• NGK: 7740

🚤 Compatibility

Commonly used on:

• Volvo Penta 3.0GXi electronic fuel-injected ignition systems

• Scheduled spark-plug replacement and ignition diagnosis

Typically suits:

• Engine models:

• 3.0GXi-J

• 3.0GXiC-J

• HP Range: Approximately 225 hp

• Engine Type: Volvo Penta GM 3.0-litre inline 4-cylinder fuel-injected marine petrol engine

• Serial Range: Not serial controlled within the listed engine models; confirm 3.0GXi-J / 3.0GXiC-J

• Year Range: Approximately late 2000s-2010s

🔌 Function

Creates the ignition spark that initiates combustion in each cylinder. Correct heat range, gap and terminal fit are necessary for clean starting, stable idle and full-load performance.

Common signs of failure:

• Engine misfires, idles roughly or hesitates under load

• Hard starting or extended cranking

• Plug electrodes are worn, fouled, overheated or fuel-soaked

• Ignition-related fault codes or uneven cylinder contribution

• Fuel consumption increases and engine power falls

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging