iFJF Carburetor Rebuild Kit for Mer‑cury Mercarb 2‑Barrel (3.0–5.7L) with Float — Gaskets & Jets Included

iFJF Carburetor Rebuild Kit fully replaces worn parts in Mer‑cury Mercarb 2‑barrel carburetors (3.0L, 4.3L, 5.0L, 5.7L) and includes the float.

This complete rebuild kit supplies the gaskets, seals, needles, jets, and float needed to refresh Mer‑cury Marine 2‑barrel carburetors used on a range of 3.0L–5.7L engines. It matches part numbers that include 3302‑804844002 and related Mercarb family references, giving a single‑package option for do‑it‑yourself maintenance or professional servicing. The kit is designed as a direct repair set for common Mercarb 2BBL models, restoring fit and function without hunting down individual components.

Which models and part numbers does this kit work with?

The kit is built to fit a broad set of Mercarb 2‑barrel carburetors used on Mer‑cury Marine 3.0L, 4.3L, 5.0L and 5.7L engines. It explicitly replaces parts referenced under OEM numbers such as 3302‑804844, 3302‑804844001, 3302‑804844002 and companion series like 3310‑861448A1 variants.

• Compatible with Mercarb 2BBL carburetors across listed engine sizes.
• Matches OEM references: 3302‑804844*, 1389‑9562A1, 1389‑9563A1, 1389‑9564A1, 1389‑9670A2.
• Also fits related 3310‑861448A1 and series 3310‑8661xx part families.
• Includes float for direct replacement during rebuild.

What components are included and will I need extra parts?

The kit contains the typical gasket sets, o‑rings, jets, needles, springs and the float shown in the product images, intended as a complete service pack for a single carburetor. In most cases you won’t need additional small parts, though specialized tools or a carburetor cleaner can help during installation.

• Gaskets and O‑rings for bowl, throttle body and choke areas.
• Main and idle jets, needle valve, seats, springs and clips.
• Complete float assembly included for level control replacement.
• May require carb cleaner, gasket scraper, and basic hand tools for installation.

How difficult is installation and how long does a rebuild usually take?

Installation difficulty ranges from moderate to advanced, depending on experience with carburetor work. A first‑time DIYer should allow a couple of hours to disassemble, clean, replace parts and reassemble carefully; a trained mechanic will typically complete the job faster.

• Estimated time: 1–3 hours for experienced users; longer for beginners.
• Requires basic mechanical skills and familiarity with carburetor linkages.
• Cleaning the carb body and passages before reassembly is important.
• Follow torque specs and float level guidelines for best results.

Will this kit improve engine performance or fuel efficiency?

Replacing worn carburetor parts restores the original fuel metering behavior and seals, which helps the engine run more consistently. While it does not guarantee specific mileage or horsepower gains, renewing jets, needles and the float eliminates leaks and erratic idling caused by degraded components.

• Restores reliable fuel flow and idle stability.
• Reduces symptoms tied to worn seals, like hesitation or flooding.
• Optimizes jetting when combined with proper tuning and setup.
• Not a replacement for engine diagnostics if other issues persist.

Who is this for: Boat owners, marine mechanics, and hobbyists who need a single, comprehensive rebuild kit to service Mercarb 2‑barrel carburetors on Mer‑cury Marine 3.0L through 5.7L engines. It’s ideal for anyone restoring older boats, performing routine maintenance, or preparing an engine for seasonal use and who wants OEM‑matching replacement components with the convenience of a complete kit.