8M0214931 Mercury MerCruiser 27430472 Gasket | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Water Pump Cover / Gearcase Gasket - Part Number: 27-8M0214931

A genuine Quicksilver water pump cover to gearcase gasket used in selected Mercury, Mariner and related lower-unit water pump assemblies. This gasket replaces the earlier 27-430472 / 27-43047-series gasket and is commonly used around the impeller plate / cover area on 30HP to 125HP outboard gearcases and selected compatible Honda-style applications.

⚙️ Key Features

• Genuine Quicksilver OEM water pump gasket

• Correct Mercury part number 27-8M0214931

• Supersedes earlier 27-430472 gasket reference

• Used in lower-unit water pump cover / gearcase sealing applications

• Cross-referenced with Honda 19242-ZW1-003 and common aftermarket references

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-8M0214931 → Supersedes 27-430472

• 27-430472 → Supersedes / relates to 27-430471 and 27-43047

• 27-43047-series earlier OEM water pump gasket references

OEM / Related Numbers:

• 27-8M0214931

• 8M0214931

• 27430472

• 27-430472

• 430472

• 27-43047-2

• 27-430471

• 430471

• 27-43047

• 43047

Honda Cross-Referenced Numbers:

• Honda: 19242-ZW1-003

Aftermarket / Verified Equivalents:

• Sierra: 18-2565

• GLM: 30320

• Mallory: 9-60022

• Recmar: REC27-430472

🚤 Compatibility

Commonly used on:

• Mercury / Mariner 30HP to 125HP outboard water pump and gearcase gasket applications

• Mercury / Mariner BigFoot / Command Thrust style gearcase water pump applications

• Selected Honda BF75 / BF90 gearcase gasket applications where 19242-ZW1-003 is specified

Typically suits:

• Engine / gearcase models:

• Mercury 40HP EFI 4-cylinder FourStroke gear housing driveshaft applications - serial 1C033810 and below

• Mercury 40HP EFI 4-cylinder FourStroke gear housing driveshaft applications - serial 1C033811 and up

• Mercury 50HP EFI 4-cylinder FourStroke gear housing driveshaft applications

• Mercury 60HP EFI 4-cylinder FourStroke gear housing driveshaft applications

• Mercury 60HP BigFoot / Command Thrust gearcase water pump applications

• Mercury 70HP 3-cylinder - serial 0A996142 to 0B240450

• Mercury 70HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 75HP 3-cylinder - serial 0A996142 to 0B240450

• Mercury 75HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 75HP 3-cylinder - serial 0C222000 to 0D283221

• Mercury 75HP 3-cylinder - serial 0D283222 to 0G760299

• Mercury 75HP 3-cylinder - serial 0G760300 to 0T979999

• Mercury 75 EFI FourStroke applications using 27-8M0214931 where specified

• Mercury 80HP 3-cylinder - serial 0A996142 to 0B240450

• Mercury 80HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 80 Jet water pump applications where 27-8M0214931 is specified

• Mercury 90HP 3-cylinder - serial 0A996142 to 0B240450

• Mercury 90HP 3-cylinder - serial 0B240451 to 0C221999

• Mercury 90HP 3-cylinder - serial 0C222000 to 0D283221

• Mercury 90HP 3-cylinder - serial 0D283222 to 0G760299

• Mercury 90HP 3-cylinder - serial 0G760300 to 0T979999

• Mercury 100HP 4-cylinder water pump applications where 27-8M0214931 is specified

• Mercury 115HP 4-cylinder - serial 0C100000 to 0D283221

• Mercury 115HP 4-cylinder - serial 0D283222 to 0G760299

• Mercury 115HP 4-cylinder - serial 0G760300 to 0T979999

• Mercury 115 EFI FourStroke water pump applications where 27-8M0214931 is specified

• Mercury 125HP 4-cylinder water pump applications where 27-8M0214931 is specified

• Honda BF75 / BF90 gearcase water pump applications using Honda 19242-ZW1-003 where specified

• HP Range: commonly Mercury / Mariner 30HP - 125HP where specified

• Engine Type: Mercury / Mariner 2-stroke and FourStroke outboard, selected Honda applications by cross-reference

• System Type: Water pump cover / gearcase gasket

🔌 Function

The gasket seals the water pump cover or impeller plate area against the gearcase so the water pump can maintain cooling water pressure.

Common signs of failure:

• Weak water pressure after pump service

• Overheating at idle or load

• Water leakage around pump cover joint

• Torn or compressed gasket during disassembly

• Poor cooling despite new impeller

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging