478m0214945 Mercury MerCruiser 478037481 Impeller | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Water Pump Impeller - Part Number: 47-8M0214945

Genuine Quicksilver/Mercury water pump impeller for selected Mercury and Mariner 6HP-9.9HP small outboard lower-unit water pump applications. This OEM impeller supersedes the earlier 47-8037481 reference and is used on selected Japanese International two-stroke and 209cc carburetted four-stroke standard gearcase models.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM water pump impeller

• Current service replacement for 47-8037481 applications

• Designed for selected Mercury / Mariner 6HP-9.9HP small outboards

• Used on standard gearcase water pump assemblies

• Helps restore cooling-water flow, pump priming and water pressure

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 47-8M0214945 → Supersedes 47-8037481

• 47-8037481 earlier OEM reference

OEM / Related Numbers:

• 47-8M0214945

• 8M0214945

• 478M0214945

• 47-8037481

• 8037481

• 478037481

Aftermarket / Verified Equivalents:

• AMS: HJ-HJB-P-3B2

• REC: REC47-8037481

• Aftermarket service kit references where matched to standard gearcase 8037481 pump applications

🚤 Compatibility

Commonly used on:

• Mercury / Mariner 6HP-9.9HP small outboard lower-unit water pump assemblies

• Mercury / Mariner Japanese International small two-stroke applications

• Mercury / Mariner 209cc carburetted four-stroke standard gearcase applications

Typically suits:

• Engine models:

• Mercury 6HP Japanese International 2-Stroke, serial 0N02790 and up

• Mercury 8HP Japanese International 2-Stroke, serial 0N02790 and up

• Mercury 9.9HP Japanese International 2-Stroke, serial 0N260037 and up

• Mercury 8HP Carb 209cc 4-Stroke standard gearbox, serial 0R042475 and up

• Mercury 9.9HP Carb 209cc 4-Stroke standard gearbox, serial 0R042475 and up

• Mariner 6HP / 8HP / 9.9HP Japanese International outboard applications using the matching 8037481-style impeller

• Mercury / Mariner 6HP-9.9HP standard gearcase service applications where the parts diagram specifies 47-8M0214945

• HP Range: 6HP - 9.9HP

• Engine Type: Mercury / Mariner small outboard standard gearcase water pump system

• Year Range: Application dependent by 0N and 0R serial range

🔌 Function

The impeller rotates inside the lower-unit water pump housing to pull cooling water into the engine. A correctly fitted impeller helps maintain water flow, prevents overheating and supports reliable operation at idle, low speed and operating RPM.

Common signs of failure:

• Weak tell-tale water stream

• Engine overheating warning

• Reduced cooling-water pressure

• Pump not priming after storage

• Cracked, stiff or missing impeller vanes

• Rubber fragments in cooling passages

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging