478M0104229 Mercury MerCruiser Impeller Kit | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Sea Water Pump Impeller Kit - Part Number: 47-8M0104229

Genuine Quicksilver/MerCruiser sea water pump impeller kit for selected MerCruiser V6 and V8 engine-mounted sea water pump assemblies. This OEM two-piece impeller kit replaces earlier 862232A2 impeller kit applications and is commonly used on late-model Bravo, inboard, TowSport and closed-cooling MerCruiser raw-water pump systems.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM sea water pump impeller kit

• Two-piece water pump repair kit for MerCruiser engine-mounted sea water pump assemblies

• Designed for selected V6 and V8 MerCruiser petrol engine applications

• Replaces earlier 47-862232A2 impeller kit reference

• Helps restore raw-water flow through Bravo, inboard, ski and closed-cooling pump systems

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 47-8M0104229 → Supersedes 47-862232A2

• 47-862232A2 earlier OEM reference

OEM / Related Numbers:

• 47-8M0104229

• 8M0104229

• 478M0104229

• 47-862232A2

• 862232A2

• 817275Q05 related water pump rebuild kit reference

• 8M0139984 related sea water pump housing assembly reference

Aftermarket / Verified Equivalents:

• Sierra: 18-3016-1

• EMP: 47-09201

🚤 Compatibility

Commonly used on:

• MerCruiser V6 and V8 engine-mounted sea water pump assemblies

• MerCruiser Bravo-drive raw-water pump applications

• MerCruiser inboard and TowSport sea water pump assemblies

• MerCruiser closed-cooling Alpha / Bravo standard-cooling systems where fitted with the matching Gen III style pump assembly

Typically suits:

• Engine models:

• MerCruiser 4.3L Carb Alpha / Bravo with closed-cooling sea water pump assembly

• MerCruiser 5.0L stern drive sea water pump assembly, 1998 application

• MerCruiser 5.7L stern drive sea water pump assembly, 1998 application

• MerCruiser 5.7L / 350 CID MPI Alpha remanufactured engines, serial range 1G400000 - 1G499999

• MerCruiser 5.7L MPI TowSport with Gen III sea water pump, serial 1A091881 and up

• MerCruiser 383 Stroker Scorpion, serial 1G300000 and up

• MerCruiser 496 MAG, serial range 0M025000 - 0M687082

• MerCruiser 496 MAG H.O., serial 1A611928 and up

• MerCruiser 8.1L / 496 CID Bravo, serial range 1G700000 - 1G701393

• MerCruiser 8.1L / 496 CID H.O. Bravo, serial range 1G701569 - 1G799999

• MerCruiser 8.1L inboard sea water pump applications using the matching impeller kit

• MerCruiser 8.2L MAG EC H.O., serial 1A350340 and up

• MerCruiser 6.2L / 377 CID V8 sea water pump applications using 47-8M0104229

• HP Range: Application dependent across MerCruiser V6 and V8 petrol engine packages

• Engine Type: MerCruiser petrol stern drive / inboard engine-mounted raw-water pump system

• Year Range: Late-model MerCruiser applications, commonly 1998 onwards depending on engine package, cooling system and serial number

🔌 Function

The sea water pump impeller kit services the engine-mounted raw-water pump that draws water from outside the boat and circulates it through the cooling system. A correctly functioning impeller kit helps maintain raw-water flow, cooling performance and engine temperature control.

Common signs of failure:

• Engine overheating

• Reduced raw-water flow

• Overheating at idle or under load

• Cracked, worn or missing impeller blades

• Rubber fragments in the cooling system

• Squealing or dry-running sea water pump

• Poor cooling performance after long storage

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging