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

🚤 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

🔄 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

📦 Condition

• Genuine Quicksilver part
• Brand new
• Supplied in original or equivalent packaging