40470 Aftermarket Mercruiser Carburettor Service Kit 3.9 & 110 Inline Models | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury/Mariner outboard carburettor service kit - Part Number: 40470

A carburettor service kit for selected Mercury and Mariner two-stroke outboards using AJ, KA, KB, KC or KD carburettor families. Despite the supplied MerCruiser wording, 40470 is an aftermarket outboard kit reference and is not intended for MerCruiser sterndrive engines.

⚙️ Key Features

• Services one Mercury/Mariner outboard carburettor

• Covers early AJ, KA, KB, KC and KD carburettor families

• Suitable for selected small inline and larger inline outboard engines

• Cross-references to Sierra and Mallory service kits

• Not a MerCruiser inboard or sterndrive kit

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 40470 (GLM aftermarket reference)

• 18-7013 (Sierra cross-reference)

OEM / Related Numbers:

• 40470

• GLM 40470

Aftermarket / Verified Equivalents:

• Sierra: 18-7013

• Mallory: 9-37302

• Recmar equivalent service configuration: REC18-7013

Included Components:

• Needle-and-seat assembly - Component service reference: supplied in 40470 / 18-7013

• Float-bowl gasket - Component service reference: supplied in 40470 / 18-7013

• Carburettor body and mounting gaskets - Component service reference: supplied in 40470 / 18-7013

• Fuel-strainer and cover gaskets - Component service reference: supplied in 40470 / 18-7013

• O-rings, seals, washers and small service hardware - Component service reference: supplied in 40470 / 18-7013

🚤 Compatibility

Commonly used on:

• Mercury and Mariner carburetted two-stroke outboards

Typically suits:

• Engine models:

• Mercury 3.9HP early inline models

• Mercury 110-series and related inline outboards using AJ/KA/KB/KC/KD carburettors

• Selected 4HP-135HP engines where the original carburettor cross-references to 18-7013

• HP Range: Approximately 3.9HP - 135HP, determined by carburettor family

• Engine Type: Carburetted two-stroke outboard

• Year Range: Early Mercury/Mariner carburettor applications; confirm by carburettor code

• Quantity Required: One kit per carburettor

🔌 Function

The service kit renews the inlet-valve and sealing components that regulate bowl fuel level and prevent air or fuel leakage through the carburettor joints.

Common signs of failure:

• Hard starting or excessive choke/enrichment required

• Rough idle, hunting or repeated low-speed stalling

• Hesitation, flat spots or intake backfire during acceleration

• Fuel leakage, flooding or an incorrect float-bowl level

• Lean surging, reduced power or fuel starvation under load

• Rich running, smoke, spark-plug fouling or excessive fuel consumption

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging