Mercury 21-8M0084276 Fuel Pump Check Valve Kit - 75/80/85 HP TwoStroke

The Mercury 21-8M0084276 Fuel Pump Check Valve Kit is a genuine OEM replacement kit for select Mercury 2-cycle outboards. This kit is designed for compatible 75 HP, 80 HP, and 85 HP 4-cylinder applications where specified by the Mercury parts diagram.

A properly functioning fuel pump check valve helps support correct fuel movement through the fuel system during operation. Using genuine Mercury fuel system components helps maintain proper fit, function, and dependable outboard performance during service or repair.

Product Features:

• Genuine OEM Mercury fuel pump check valve kit
• Designed for select Mercury 2-cycle outboards
• Fits select 75, 80, and 85 HP 4-cylinder applications
• Replacement check valve kit for compatible Mercury outboard fuel pumps
• Helps support proper fuel system operation
• Direct replacement where part number 21-8M0084276 or 8M0084276 is specified
• Supersedes Mercury 21-30430A13

Product Details:

• Brand: Mercury
• Manufacturer Part Number: 21-8M0084276
• OEM Part Number: 8M0084276
• Part Type: Fuel Pump Check Valve Kit
• Application: Select Mercury 2-cycle outboards
• Engine Type: TwoStroke / 2-cycle

Fits Select Mercury Applications:

• 75 HP 4-cylinder outboards, serial number 6432901 and up
• 80 HP 4-cylinder / 800 series outboards where specified
• 85 HP 4-cylinder / 850 series outboards where specified

Supersedes:

• 21-30430A13

Service Note: See your Mercury owner’s manual or service manual for specific fuel pump service procedures, application details, and installation instructions.

Fitment Note: Fuel pump check valve kit fitment should be verified by outboard model, horsepower, cylinder count, serial number, fuel pump style, parts diagram, and existing part number before ordering. Please confirm this check valve kit is correct for your Mercury 2-cycle outboard before purchasing.

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