Mercury – Quicksilver Carburetor Repair Kit | Fuel System Component | Inline 2-Stroke | 51091

Overview

If your outboard is sputtering, running unevenly, or just feels a little down on power, it might be time to give the carburetor a fresh start. The Mercury Marine 51091 Quicksilver Carburetor Repair Kit has everything you need to bring your inline Mercury or Mariner 2-stroke outboard back to smooth, strong performance. Designed for 40-150 horsepower engines, this OEM kit includes all the small but vital parts — gaskets, seals, jets, valves, and springs — that wear out over time. Once rebuilt, your carb runs clean, fuel delivery stays even, and your engine feels brand new again.

Key Features

• Purpose: Restores carburetor performance for better fuel delivery and throttle response.
• Contents: Includes seals, gaskets, springs, jets, washers, and needle valves.
• Design: Matches Mercury’s original carburetor specifications for precise fit and fuel control.
• Performance: Helps prevent flooding, hesitation, or fuel leaks caused by worn internal parts.
• Durability: All parts are made from marine-rated materials that resist fuel, oil, and corrosion.
• Compatibility: For inline Mercury and Mariner 40-150HP 2-stroke outboards.

Engine & Boat Compatibility

• Mercury 40HP inline 2-stroke outboards
• Mercury 50HP inline 2-stroke outboards
• Mercury 75HP inline 2-stroke outboards
• Mercury 90HP inline 2-stroke outboards
• Mercury 115HP inline 2-stroke outboards
• Mercury 150HP inline 2-stroke outboards
• Mariner inline 2-stroke outboards within the same horsepower range

Performance & Real-World Benefits

The 51091 carb repair kit replaces worn internal components that cause inconsistent fuel flow or air leaks. By rebuilding the carb with fresh gaskets, seals, and valves, you restore proper fuel atomization and smoother idle. You’ll notice easier starting, quicker throttle response, and cleaner running at all speeds.

Over time, ethanol, vibration, and corrosion can wear out delicate carb parts. Rebuilding with genuine Mercury components gives you the peace of mind that everything fits and functions exactly as it should — no guesswork, no improvisation, just factory-level performance.

Why Choose Mercury OEM

The Quicksilver 51091 is an authentic Mercury Marine kit, built specifically for Mercury and Mariner carburetors. Cheaper aftermarket kits often include mismatched or low-grade components that don’t hold up to ethanol-blended fuels or saltwater use.

Mercury OEM parts are tested for precise fuel metering, proper sealing, and long-term reliability. Using the correct kit means your outboard runs the way it did when it left the factory — smooth, powerful, and dependable.

FAQ

Q1: Which engines is this kit for?
It’s made for Mercury and Mariner inline 40-150HP 2-stroke outboards.

Q2: What’s included in the kit?
The kit includes jets, gaskets, seals, washers, needle valves, and springs.

Q3: Why rebuild instead of replacing the carburetor?
A rebuild restores like-new performance at a fraction of the cost of a new carb.

Q4: How often should I rebuild?
Inspect your carb every season and rebuild when performance issues or leaks appear.

Q5: Why use OEM instead of aftermarket?
OEM kits are engineered for perfect fit and consistent fuel delivery — key to Mercury reliability.