iFJF Carburetor Rebuild Kit for Mer‑cury Mercarb 2‑BBL (3.0–5.7L) With Float — Complete Gasket & Jet Set

An all‑in‑one iFJF carburetor rebuild kit designed to restore performance for Mer‑cury Mercarb 2‑BBL engines (3.0L, 4.3L, 5.0L, 5.7L) and compatible part numbers, including the float.

If your Mer‑cury 2‑barrel carburetor shows signs of leaks, rough idle, or fuel starvation, this comprehensive rebuild kit supplies the gaskets, seals, needles, jets and float needed to return the carburetor to reliable operation. The kit is built to replace multiple Mer‑cury OEM numbers like 3302‑804844002 and related Mercarb family parts, so it's suitable for a range of small‑block Mer‑cury gasoline marine engines.

Which Mer‑cury carburetors and engines does this kit fit?

This kit covers Mercarb 2‑barrel carburetors used on 3.0L, 4.3L, 5.0L, and 5.7L Mer‑cury marine engines, and it directly replaces several OEM numbers. It fits a broad list of Mercarb casting and rebuild references, making it a versatile option for common Mer‑cury applications.

• Compatible with Mercarb 2‑BBL family carburetors
• Replaces part numbers like 3302‑804844, 3302‑804844002
• Fits related references 3310‑861448A1 and subsequent series
• Contains a pre‑installed float for immediate use

What components are included and how complete is the kit?

The iFJF kit is supplied with a full complement of gaskets, O‑rings, needle valves, jets, springs and a float so you can perform a top‑to‑bottom rebuild of the carburetor. It’s intended to provide every small consumable part shown in the product imagery so you won’t need to source multiple separate pieces.

• Main and idle jets, power valves, and metering parts
• All valves, needles, and replacement float included
• Comprehensive gasket sets for bowls and mounting surfaces
• Assorted springs, screws and seals to finish the rebuild

How will installing this rebuild kit affect engine behavior?

Replacing worn internal parts and seals restores correct fuel metering and float operation, which reduces hard starting, bogging, and fuel leaks. While not a guaranteed performance upgrade, a properly rebuilt carburetor helps the engine run more consistently and respond predictably across throttle positions.

• Improves fuel metering stability at idle and cruise
• Reduces chance of float bowl leaks and flooding
• Helps eliminate hesitation and uneven throttle response
• Supports easier tuning and quicker troubleshooting

What should you prepare before starting the rebuild?

Gather basic tools, a clean workspace, carburetor cleaner, and a service manual or exploded diagram for the specific Mercarb casting so you can follow torque and adjustment specs. Inspect the carburetor body for corrosion or damage; if the body is cracked or heavily corroded, parts replacement may be necessary instead of a rebuild.

• Basic hand tools: screwdrivers, small sockets, pliers
• Carb cleaner, lint‑free cloths, and small container for parts
• Service diagram for jet sizes, floats and linkage alignment
• Optional small magnifier and pick set for seals and tiny springs

Who is this for: The iFJF carburetor rebuild kit is aimed at boating owners, mechanics and DIY enthusiasts who maintain Mer‑cury 2‑barrel engines (3.0L–5.7L) and need a single kit that replaces common OEM numbers such as 3302‑804844002 and related Mercarb references. Choose this kit if you want a complete set of internal replacement parts including a float to restore serviceability without hunting down individual items. If the carburetor casting shows severe corrosion or major physical damage, consider replacing the carburetor body in addition to using a rebuild kit.