12342-PCX-004 Honda Marine Spark Plug Seal | Genuine OEM Outboard Part

🔧 Product Description

Genuine Honda Spark Plug Tube Seal - Part Number: 12342-PCX-004

New genuine Honda NOK spark-plug-tube seal used in the cylinder-head cover on BF135 and BF150 outboards. Four seals are normally used per engine, with one seal fitted around each spark-plug tube.

⚙️ Key Features

• Genuine Honda NOK moulded tube seal

• Seals the rocker cover around each spark-plug tube

• Prevents engine oil entering the plug wells

• Oil- and heat-resistant elastomer construction

• Quantity required: normally four per inline-four engine

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 12342-PCX-004 (Honda OEM spark-plug-tube seal reference)

OEM / Related Numbers:

• 12342-PCX-004

Aftermarket / Verified Equivalents:

• Aftermarket K24 spark-plug-tube seal equivalents

• Confirm dimensions and NOK-style profile before substitution

🚤 Compatibility

Commonly used on:

• Honda Marine four-stroke outboard engines

Typically suits:

• Engine models:

• BF135A/BF135AK2

• BF150A/BF150AK2

• BF135D and BF150D cylinder-head covers using 12342-PCX-004

• HP Range: 135HP - 150HP

• Engine Type: Honda K24 inline-four four-stroke outboard

• Year Range: Approximately 2004 onward; cover revision dependent

🔌 Function

This precision-formed gasket seals the mating surfaces identified in the compatibility section. It prevents combustion gas, intake air, exhaust gas, cooling water, engine oil or fuel vapour from escaping or crossing between adjoining passages.

Common signs of failure:

• Engine oil accumulates inside a spark-plug well

• Ignition-coil boots are oil-soaked or swollen

• Misfire occurs because oil contaminates a plug or coil

• Seal lip is hardened, torn or no longer grips the tube

• Cylinder-head cover has been removed and the seal is disturbed

📦 Condition

• Genuine Honda part

• Brand new

• Supplied in original or equivalent packaging