278M0072137 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Water Pump Outer Plate Gasket - Part Number: 27-8M0072137

A genuine Quicksilver water-pump and pump-case gasket for selected Mercury and Mariner small two-stroke outboards.

The gasket seals the outer plate or pump-case joint, allowing the impeller to draw and pressurise cooling water without leakage around the water-pump housing.

⚙️ Key Features

• Genuine Quicksilver OEM water-pump gasket

• Correct current Mercury part number 27-8M0072137

• Supersedes earlier 16158-series gasket references

• Used on selected 6HP to 9.9HP Japanese-production outboards

• Recmar and AMS replacement references available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-8M0072137 → Supersedes 27-161585

• 27-161585 → Supersedes / relates to 16158015

• 16158015 earlier OEM pump-case gasket reference

OEM / Related Numbers:

• 27-8M0072137

• 8M0072137

• 278M0072137

• 27-161585

• 161585

• 16158015

• EAN: 745061606197

Aftermarket / Verified Equivalents:

• Recmar: PAF8-04000008

• AMS: 27-8M0072137 replacement gasket

• Aftermarket: 16158015 / 161585 outer plate gasket

🚤 Compatibility

Commonly used on:

• Mercury and Mariner small-outboard water-pump cases

• Japanese-production two-stroke lower units

Typically suits:

• Engine models:

• Mercury / Mariner 6HP two-stroke Japanese-production models

• Mercury / Mariner 8HP two-stroke Japanese-production models

• Mercury / Mariner 9.9HP two-stroke Japanese-production models

• Mercury F8 lower-unit applications using gasket 8M0072137

• Mercury F9.9 lower-unit applications using gasket 8M0072137

• Pump-case assemblies using water-pump base 46-803750A01 or upper housing 46-803750A02

• HP Range: 6HP - 9.9HP

• Engine Type: Mercury / Mariner small two-stroke outboard

• System Type: Water-pump outer plate / pump-case gasket

🔌 Function

The gasket seals the pump-case joint so the impeller can create the suction and pressure required to circulate cooling water.

Common signs of failure:

• Weak tell-tale flow

• Engine overheats after water-pump service

• Air enters around the pump case

• Gasket torn or incorrectly positioned

• Water pressure remains low with a new impeller

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging