8M0114788 Mercury MerCruiser Wear Plate | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Wear Plate Seal - Part Number: 8M0114788

Genuine Quicksilver wear plate seal for compatible Mercury MerCruiser sea water pump assemblies. This OEM outer wear plate is used in Design II heavy-duty seawater pump service applications and provides the correct sealing surface for the impeller inside the raw-water pump.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM wear plate seal

• Outer wear plate used in compatible Design II seawater pump service assemblies

• Works with the matching 0.030 in. shorter heavy-duty impeller where specified

• Helps restore the correct impeller sealing surface inside the pump body

• Designed for compatible MerCruiser raw-water cooling pump applications

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• No available supersession chain

OEM / Related Numbers:

• 8M0114788

• 27-8M0114788

• 278M0114788

• 8M0121940 related heavy-duty seawater pump impeller kit

• 47-8M0137221 related heavy-duty seawater pump impeller kit

• 47-8M0137220 related heavy-duty seawater pump impeller kit

• 8M0103389 matching 0.030 in. shorter heavy-duty impeller

• 8M0072979 matching overmolded inner wear plate

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• MerCruiser Design II heavy-duty sea water pump service assemblies

• MerCruiser closed cooling and Bravo standard cooling sea water pump assemblies

Typically suits:

• Engine models:

• MerCruiser MCM 4.3L MPI using the matching heavy-duty seawater pump kit

• MerCruiser MIE 4.3L MPI using the matching heavy-duty seawater pump kit

• MerCruiser MCM 5.0L MPI using the matching heavy-duty seawater pump kit

• MerCruiser 350 MAG MPI using the matching heavy-duty seawater pump kit

• MerCruiser 4.5L Bravo, serial number 2A531163 and up

• MerCruiser 6.2L Bravo, serial number 2A531197 and up

• MerCruiser 6.2L Inboard, serial number 2A530774 and up

• MerCruiser 6.2L TowSport, serial number 2A531348 and up

• HP Range: 4.3L - 6.2L MerCruiser petrol engine packages where fitted with the matching Design II sea water pump assembly

• Engine Type: MerCruiser engine-mounted raw-water / sea water pump system

• Year Range: Approximately 2010s onwards for listed late-model Design II pump applications, depending on engine serial number

🔌 Function

The wear plate forms a smooth sealing face for the sea water pump impeller. It helps the pump maintain suction and water pressure by reducing internal leakage around the impeller and protecting the pump body from wear caused by debris or impeller contact.

Common signs of failure:

• Reduced raw-water flow

• Engine overheating at idle or under load

• Scored, grooved or corroded wear plate surface

• Poor cooling performance after impeller replacement

• Water pump not priming correctly

• Visible wear or seal damage inside the pump assembly

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging