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Carburetor Rebuild Kit – Fits Mercury Force 90-95 HP (Replaces 809735A1, FK10357)

Regular price $15.88

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Orders are typically processed within 1–2 business days.


U.S. orders usually arrive within 6–15 days, depending on stock location and destination.


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If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Carburetor Rebuild Kit – Fits Mercury Force 90-95 HP (Replaces 809735A1, FK10357) is engineered for Mercury Force 90HP (1991–1999) and 95HP (1996–1997) outboard motors. It is also fully compatible with Mercury Sport Jet 90HP (1993–1995) and 95XR (1996–1997) jet drive models, providing everything needed for a complete service.

This kit serves as a direct replacement for Mercury OEM part 809735A1 and aftermarket equivalents including Sierra FK10357 and 18-7806-1.

  • Engineered for a direct OEM-equivalent fit and function.
  • Includes all necessary gaskets and a diaphragm for a comprehensive carburetor overhaul.
  • Designed specifically for use with gasoline-fueled 2-stroke marine engines.

Part Number Matrix

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

Brand Part Number
Mercury 809735A1
Sierra FK10357
Sierra 18-7806-1

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Force Outboard 75 2-Stroke 1999 809735A1 S/N Range: 0E345000-0E369299
Force Outboard 90 2-Stroke 1996 809735A1 S/N Range: 0E138600-0E202999
Force Outboard 90 2-Stroke 1997 809735A1 S/N Range: 0E203000-0E287999
Force Outboard 90 2-Stroke 1999 809735A1 S/N Range: 0E345000-0E369299
Mercury Sport Jet 90 90 2-Stroke 1993–1995 809735A1 Non-Oil Injection, S/N: 0E023150-0E066619
Mercury Sport Jet 90 90 2-Stroke 1993–1995 809735A1 Oil Injection, S/N: 0E066620-0E095087
Mercury Sport Jet 95XR 95 2-Stroke 1996–1997 809735A1 S/N: 0E141089-0E315904

Technical Specs

Product Type
Carburetor Repair/Rebuild Kit
Installation
OEM Direct Replacement
Fuel Type
Gasoline
Materials
Various (gaskets, diaphragm materials)
Package Dimensions
Approx. 114 × 70 × 16 mm (4.5 × 2.75 × 0.63 in)
Weight
9g (0.02 lb)

What’s in the Box

  • 1 x Carburetor Rebuild Kit (809735A1) containing:
    • 1 x Diaphragm (F438747)
    • 1 x Gasket (F438617/27-820490)
    • 1 x Gasket (F438760/27-823606)
    • 1 x Gasket (F84792)

Installation Notes

  1. Disconnect the battery and safely detach fuel lines before starting.
  2. Carefully remove the carburetor from the engine housing.
  3. Disassemble the carburetor on a clean surface, taking note of the location of each part.
  4. Thoroughly clean all metal components with a quality carburetor cleaner; do not spray cleaner on non-metal parts.
  5. Replace the old gaskets, seals, and diaphragm with the new components from the kit.
  6. Reassemble the carburetor, ensuring all parts are correctly seated and screws are tightened to specification.
  7. Reinstall the carburetor on the engine, reconnect fuel lines and linkages, and check for leaks before starting.

Troubleshooting & FAQ

How can I tell if my carburetor needs a rebuild?

Common symptoms of a failing carburetor include difficulty starting, rough idling, stalling at low speeds, hesitation upon acceleration, black smoke from the exhaust, or visible fuel leaks around the carburetor body.

Will this kit fit a 1998 Force 90 HP engine?

No, this particular kit does not cover the 1998 model year for the 90 HP Force. Based on available data, it fits 1996, 1997, and 1999 models. Always verify your engine's serial number against the ranges provided in the compatibility list to guarantee a match.

What is the recommended replacement interval for these parts?

For optimal performance, it is recommended to inspect your carburetor annually and perform a rebuild every 2-3 years, or more frequently if you experience performance issues, use ethanol-blended fuels, or operate in harsh marine environments.

Are any special tools or sealants required for installation?

Standard mechanical tools are sufficient. No sealant should be used on the gaskets, as they are designed to seal dry. Applying sealants can cause blockages in the carburetor's small fuel passages.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

  • Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
  • This is an aftermarket replacement, not an OEM component.
  • 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 QC.

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