4789984T3 Mercury MerCruiser Impeller 89984T 3 | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Water Pump Impeller - Part Number: 47-89984T3

Genuine Quicksilver/Mercury water pump impeller for selected MerCruiser #1, R, MR and Alpha One Gen I stern drive water pump assemblies, plus selected Mercury / Mariner outboard gearcase applications. This OEM 89984-series impeller restores cooling-water flow through the lower-unit or stern drive pump and helps protect the engine from overheating.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM water pump impeller
• Used in selected MerCruiser #1, R, MR and Alpha One Gen I stern drive applications
• Also used in selected Mercury / Mariner outboard gear housing water pump assemblies
• Helps restore cooling-water pressure and raw-water flow
• Direct replacement for earlier 30221, 65960 and 89984-series impeller references

🚤 Compatibility

Commonly used on

• MerCruiser #1, R, MR and Alpha One Gen I stern drive water pump assemblies
• Mercury / Mariner outboard gearcase water pump assemblies using the 89984-series impeller
• Selected Chrysler / Force / US Marine cross-reference applications using the matching 803631T / F694065 impeller style

Typically suits

• Engine models:
• MerCruiser #1 stern drive units through serial number 0D494568
• MerCruiser R stern drive units through serial number 0D494568
• MerCruiser MR stern drive units through serial number 0D494568
• MerCruiser Alpha One Gen I stern drive units through serial number 0D494568
• MerCruiser 190 Inboard raw-water pump, serial range 1564539 - 1720903
• MerCruiser 225 Inboard raw-water pump, serial range 1539620 - 2278646
• Mercury 150HP Pro XS, serial range 1B690542 - 2B535572, gear housing / driveshaft water pump application
• Mercury 175HP DFI Pro XS, serial range 1B516339 - 2B535624, gear housing / driveshaft water pump application
• Mercury 200HP EFI, serial range 0T801000 - 1B226999, standard / counter-rotation gear housing water pump application
• Mercury V-150 EFI 2-Stroke gear housing water pump application
• Mercury / Mariner early inline 6-cylinder outboard gearcase applications using 89984-series impeller
• Mercury / Mariner early V6 outboard gearcase applications using 89984-series impeller
• Chrysler / Force / US Marine outboard applications using 47-803631T / 47-F694065 cross-reference impeller
• HP Range: Approximately 65HP - 250HP for Mercury / Mariner outboard applications where the 89984-series gearcase pump is fitted, plus listed MerCruiser stern drive and inboard pump applications
• Engine Type: Mercury / Mariner outboard and MerCruiser stern drive / inboard raw-water pump system
• Year Range: Application dependent; MerCruiser #1 / R / MR / Alpha One Gen I through serial number 0D494568, with outboard fitment dependent on gearcase and serial number

🔌 Function

The impeller rotates inside the lower-unit or stern drive water pump housing to draw cooling water through the drive and circulate it through the engine cooling system. Correct impeller condition is critical for raw-water flow, temperature control and engine protection.

⚠️ Common Signs of Failure

• Weak or no tell-tale water stream
• Engine overheating alarm
• Reduced cooling-water pressure
• Overheating at idle, low speed or under load
• Cracked, hardened, curled or missing impeller vanes
• Rubber fragments found in the cooling system
• Pump housing damage from failed impeller operation

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 47-89984T3 → Supersedes 47-89984B2
• 47-89984B2 → Supersedes 47-89984
• 47-89984 → Supersedes 47-65960
• 47-65960 → Supersedes 47-30221
• 47-30221 earlier Mercury impeller reference

OEM / Related Numbers

• 47-89984T3
• 89984T3
• 4789984T3
• 47-89984T 3
• 89984T 3
• 47-89984B2
• 89984B2
• 47-89984
• 89984
• 47-899842
• 899842
• 47-899844
• 899844
• 47-89984T4 later / related service reference
• 89984T4
• 47-30221
• 30221
• 47-65960
• 65960
• 47-85460
• 85460
• 47-803631T
• 803631T
• 47-F694065
• F694065

Aftermarket / Verified Equivalents

• Sierra: 18-3017
• Mallory: 9-45306
• GLM: 89840
• SEI: 96-102-03
• SEI: 96-102-06K

📦 Condition

• Genuine Quicksilver part
• Brand new
• Supplied in original or equivalent packaging