2719551 Mercury MerCruiser Water Pump Gasket one | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Upper Water Pump Face Plate Gasket - Part Number: 27-19551

A genuine Quicksilver upper water pump gasket used on selected Mercury and Mariner outboard lower-unit water pump assemblies. This gasket seals the upper face plate to the water pump body and cross-references with earlier Mercury 27-32770 and Sierra 18-2824 service references.

⚙️ Key Features

• Genuine Quicksilver OEM water pump gasket

• Correct Mercury part number 27-19551

• Upper face plate to pump body gasket

• Cross-references with Mercury 27-32770

• Used in selected 30HP, 35HP, 40HP, 45HP, 50HP, 60HP, 65HP and 70HP Mercury / Mariner water pump assemblies where specified

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 27-19551 current OEM service reference

• 27-32770 earlier / related upper water pump gasket reference

OEM / Related Numbers:

• 27-19551

• 19551

• 2719551

• 27-32770

• 32770

• 32768 related face plate / wear plate

• 27-19553 related lower water pump base to face plate gasket

• 27-32769 related lower water pump gasket

• 27-32771 related water pump base gasket

• 27-19552 related water pump base gasket

• 47-89983 related impeller

• 46-77177A1 related water pump base assembly

• 46-60366A1 related water pump repair kit family

Aftermarket / Verified Equivalents:

• Sierra: 18-2824

• Sierra: 18-2824-9

• GLM: 31070

• Mallory: 9-60018

🚤 Compatibility

Commonly used on:

• Mercury / Mariner outboard upper water pump gasket applications

• Lower-unit water pump service kits using the 32768 / 54705 face plate family

Typically suits:

• Engine models:

• Mercury 30HP 2-stroke water pump applications where 27-19551 is specified

• Mercury 30HP - serial 0C159200 to 0G589999 where listed in 30HP to 70HP pump kit applications

• Mercury 30 Jet water pump applications where 27-19551 is specified

• Mercury 35HP 2-stroke water pump applications where 27-19551 is specified

• Mercury 35HP - serial 0A996142 to 0C159199 where listed in 30HP to 70HP pump kit applications

• Mercury 40HP 2-cylinder water pump applications where 27-19551 is specified

• Mercury 40HP 4-cylinder water pump applications where 27-19551 is specified

• Mercury 402 / 40HP 2-cylinder - serial 4860103 to 5556229, gear housing water pump applications where 27-32770 is replaced by 27-19551

• Mercury 45HP outboard water pump applications where 27-19551 is specified

• Mercury 50HP outboard water pump applications where 27-19551 is specified

• Mercury 60HP outboard water pump applications where 27-19551 is specified

• Mercury 65HP outboard water pump applications where 27-19551 is specified

• Mercury 70HP outboard water pump applications where 27-19551 is specified

• Mercury / Mariner 30HP to 70HP two-stroke water pump repair kit applications using impeller 47-89983 and face plate 32768 / 54705

• Mercury / Mariner lower-unit water pump assemblies using upper face plate to body gasket 27-19551 / 27-32770

• HP Range: commonly 30HP - 70HP where specified

• Engine Type: Mercury / Mariner outboard

• System Type: Upper water pump face plate to pump body gasket

🔌 Function

The gasket seals the upper face plate to the pump body, allowing the impeller to maintain cooling-water pressure without leakage around the pump housing joint.

Common signs of failure:

• Weak cooling water flow

• Engine overheating after water pump service

• Water pressure loss at idle or under load

• Gasket torn or compressed during pump rebuild

• Poor seal despite a new impeller and wear plate

📦 Condition

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging