Valve Seat Kit – Fits Mercury/Mercruiser 75HP 4-Cylinder Outboards (19271-1)

$16.99 $27.00

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Product Details

This replacement Carburetor Valve Seat Kit fits Mercury/Mercruiser 75HP 4-Cylinder outboards, specifically for models with serial numbers 6432901 and higher. It is engineered to restore proper fuel flow and engine performance by replacing old or damaged carburetor valve seats.

This kit serves as a direct replacement for Mercury/Quicksilver part number 19271-1 and Mercury part number 192711.

Designed for a direct OEM-equivalent fit.
Compatible with standard gasoline fuel systems.
Engineered for durability in marine environments.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Mercury/Quicksilver	19271-1
Mercury	192711

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Mercury engines, verify that your engine's serial number is 6432901 or higher, as this part is not compatible with earlier models.

Brand	Model	Rated HP	Notes
Mercury	75 (4 Cylinder)	75	For serial numbers 6432901 and up

Technical Specs

Product Type: Carburetor Valve Seat Kit
Installation: OEM direct replacement
Fuel Type: Gasoline
Dimensions: 5.13" x 4.0" x 1.0"
Weight: 142g (5 ounces)
Warranty: Standard Mercury Marine warranty

What’s in the Box

1 x Valve Seat Kit (19271-1)

Installation Notes

Disconnect the battery and fuel lines to ensure safety.
Carefully remove the carburetor assembly from the engine.
Disassemble the carburetor to access the old valve seat. Note the orientation of all components.
Remove the worn or damaged valve seat using an appropriate extraction tool.
Clean the valve seat housing thoroughly to remove any debris or sealant residue.
Gently press the new valve seat into place, ensuring it is fully and evenly seated.
Reassemble the carburetor, replacing any other worn gaskets or seals as needed.
Reinstall the carburetor onto the engine, reconnect fuel lines, and connect the battery.
Prime the fuel system and check for leaks before starting the engine.

Troubleshooting & FAQ

How do I know if my carburetor valve seat needs replacement?

Common signs of a failing valve seat include fuel flooding the carburetor, fuel leaking from the carburetor overflows, difficulty starting the engine, or poor idling. These symptoms often indicate the valve is not sealing correctly against the seat.

Is this part compatible with a 75HP engine with a serial number lower than 6432901?

No, this valve seat kit is specifically designed for Mercury 75HP 4-Cylinder outboards with serial numbers 6432901 and up. Using it on earlier models may result in improper fitment and fuel system issues.

Does this kit include the needle valve?

This listing is for the valve seat kit as pictured. Typically, "valve seat kits" include the seat and related seals. Please refer to the "What’s in the Box" section and product images to confirm all included components, as the needle is often sold separately or as part of a larger carburetor rebuild kit.

Can I install this myself?

While installation is possible for those with mechanical experience, carburetor work can be intricate. We recommend professional installation to ensure correct seating, sealing, and adjustment for optimal engine performance and safety.

What is the difference between an OEM and an aftermarket part?

This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, where it is batch-inspected for consistency and reliability.

How fast is shipping?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and expedited options may appear at checkout where available for your location.

What is the warranty and return policy?

This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement component, not an OEM part.
Professional installation is recommended for safety and performance.

About Sea Sierra

Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.

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