40480 Aftermarket Mercruiser Carburettor Service Kit Chrysler & Force Outboards | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercury/Mariner WM-series carburettor service kit - Part Number: 40480

A carburettor service kit for Mercury and Mariner two-stroke outboards using WM, WMK and WMD carburettor families. Despite the supplied Chrysler/Force and MerCruiser wording, the verified 40480/18-7021 application is Mercury/Mariner outboard carburettors, typically 40HP-150HP.

⚙️ Key Features

• Services one WM, WMK or WMD outboard carburettor

• Includes multiple individually numbered Sierra gasket components

• Suitable for selected 40HP-150HP Mercury/Mariner two-strokes

• Three-carburettor engines normally require three kits

• Not a MerCruiser sterndrive carburettor kit

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 40480 (GLM aftermarket reference)

• 18-7021 (Sierra cross-reference)

OEM / Related Numbers:

• 40480

• Mercury carburettor families WM / WMK / WMD

• Related Mercury carburettor numbers: 1874, 1877, 1992, 2016, 2019, 2039, 2181, 2238

• Related Mercury carburettor numbers: 2410, 2556, 2557, 2559, 2561, 2786, 3035, 3038

• Related Mercury carburettor numbers: 3403, 3412, 3470, 3526, 3741, 3764, 3797, 3812

• Related Mercury carburettor numbers: 4189, 4210, 4218, 4219, 4255, 51091, 5413, 9257, 9259, 9260, 9261, 9262, 92621

Aftermarket / Verified Equivalents:

• Sierra: 18-7021

• EMP: 1300-36001

• GLM: 40480

• Pro Marine: 7021

Included Components:

• Carburettor flange gasket - Part Number: Sierra 18-2572

• Carburettor mounting gasket - Part Number: Sierra 18-2802

• Strainer-cover gasket - Part Number: Sierra 18-2570

• Carburettor bowl gasket - Part Number: Sierra 18-2575

• Filter-cover gasket - Part Number: Sierra 18-2569

• Strainer-cover screw gasket - Part Number: Sierra 18-2568

• Needle-and-seat and small sealing parts - Component service reference: supplied in Kit 18-7021

🚤 Compatibility

Commonly used on:

• Mercury and Mariner WM/WMK/WMD carburetted two-stroke outboards

Typically suits:

• Engine models:

• Selected 40HP, 50HP, 60HP, 65HP, 70HP, 75HP, 80HP, 90HP, 115HP, 135HP and 150HP applications

• Engines using a listed WM, WMK or WMD carburettor assembly number

• HP Range: Approximately 40HP - 150HP

• Engine Type: Carburetted two-stroke outboard

• Year Range: Approximately 1976 - 1990

• Quantity Required: One kit per carburettor; three kits for a three-carburettor engine

🔌 Function

The kit renews the bowl, mounting, strainer and filter sealing surfaces and the inlet-metering components. Correct rebuilding prevents fuel leakage, air entry and inconsistent cylinder mixture.

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