27-43006 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Thermostat Cover Gasket - Part Number: 27-430068

A genuine Quicksilver thermostat-cover gasket for selected Mercury and Mariner two-stroke outboards.

The gasket seals the thermostat cover or cooling-water cover to the cylinder head, preventing water leakage and ensuring cooling flow passes through the thermostat and intended cylinder-head passages.

⚙️ Key Features

• Genuine Quicksilver OEM thermostat-cover gasket

• Mercury 27-43006 gasket-family reference

• Used on selected small two-stroke and 70HP to 125HP outboards

• Sierra and NAPA replacements available

• Replace whenever the thermostat cover is removed

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-430068 current formatted gasket reference

• 27-430063 earlier gasket reference

• 27-430062 earlier gasket reference

• 27-430061 earlier gasket reference

• 27-43006 original OEM gasket-family reference

OEM / Related Numbers:

• 27-430068

• 430068

• 27-430063

• 27-430062

• 27-430061

• 27-43006

• 43006

Aftermarket / Verified Equivalents:

• Sierra: 18-0339

• NAPA Marine: SME180339

• PartsDepot: 27-430068 replacement gasket

🚤 Compatibility

Commonly used on:

• Mercury and Mariner thermostat-cover and cylinder-head cooling assemblies

Typically suits:

• Engine models:

• Mercury / Mariner 6HP two-stroke applications using the 43006 gasket family

• Mercury / Mariner 8HP two-stroke

• Mercury / Mariner 9.9HP and 10HP two-stroke

• Mercury / Mariner 15HP two-stroke

• Mercury 70HP 3-cylinder

• Mercury 75HP 3-cylinder

• Mercury 80HP 3-cylinder

• Mercury 90HP 3-cylinder

• Mercury 100HP 4-cylinder

• Mercury 115HP 4-cylinder

• Mercury 125HP 4-cylinder

• International 3-cylinder and 4-cylinder applications from serial 9483121 and above where the 43006 gasket family is specified

• HP Range: Selected 6HP - 15HP and 70HP - 125HP applications

• Engine Type: Mercury / Mariner two-stroke outboard

• System Type: Thermostat or cooling-water cover gasket

🔌 Function

The gasket seals the thermostat-cover joint so cooling water remains within the designed cylinder-head passages.

Common signs of failure:

• Water leaking around the thermostat cover

• Salt deposits at the gasket joint

• Engine temperature becomes unstable

• Gasket tears during cover removal

• Cover will not seal after thermostat service

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging