Description

Mercury / MerCruiser Quicksilver Carburetor Float Kit — 8M0120190

The Mercury Quicksilver 8M0120190 is a genuine OEM carburetor float kit used in select MerCruiser carbureted engines equipped with Weber carburetors. The float regulates the fuel level inside the carburetor bowl to maintain the correct fuel-to-air mixture for proper engine operation.

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Key Specifications

• Part Number: 8M0120190

• Component Type: Carburetor float / float kit

• Material:Brass float

• OEM Brand: Mercury Marine / Quicksilver

• Supersedes:811536 / 811536T

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Compatible Engines

Commonly used on MerCruiser carbureted engines with Weber carburetors, including:

• 4.3L V6

• 5.0L V8 (305 CID)

• 5.7L V8 (350 CID)

• 7.4L V8 (454 CID)

• 8.2L V8 (502 CID)

Typical model years span late-1980s through mid-1990s MerCruiser engines using Weber 2-barrel or 4-barrel carburetors.

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Function

The carburetor float controls the fuel level inside the carburetor bowl:

• As fuel enters the bowl, the float rises.

• When the correct fuel level is reached, it closes the needle valve.

• When fuel is consumed by the engine, the float drops and allows more fuel to enter.

This cycle keeps the fuel level stable so the engine receives the proper mixture.

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Signs of a Bad Float

A damaged or leaking float can cause:

• Engine running rich

• Fuel flooding in the carburetor

• Hard starting

• Fuel leaking from the carburetor vent

Replacing the float restores proper fuel level control and engine performance.

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Fitment Tip:
Always verify compatibility using the engine serial number and carburetor model. MerCruiser engines used several different carburetor designs (Weber, Rochester, etc.), and the float style must match the carburetor assembly.

Shipping: Ships same or next day for fast Canada wide shipping.