Inline Fuel Filter – Fits Yamaha 4-9.9 HP Outboards (Replaces 646-24251-01-00, 646-24251-02-00)

Vendor: JLM Marine
Availability: In Stock
Product Type: Fuel Filter
$18.46
$18.46
Subtotal: $18.46

Free Shipping

Free standard shipping on all orders under 1 KG

Worry-Free Returns

Learn More.
photo of inline fuel filter for yamaha 4-9.9 hp 646-24251-01-00 with barbed ends and cylindrical white plastic body

Inline Fuel Filter – Fits Yamaha 4-9.9 HP Outboards (Replaces 646-24251-01-00, 646-24251-02-00)

$18.46

Inline Fuel Filter – Fits Yamaha 4-9.9 HP Outboards (Replaces 646-24251-01-00, 646-24251-02-00)

$18.46

Inline Fuel Filter – Fits Yamaha 4-9.9 HP Outboards (Replaces 646-24251-01-00, 646-24251-02-00)

This inline fuel filter fits a range of Yamaha 4-9.9 HP 2-Stroke (1989-2002) and specific 4-Stroke models, including the F4A, F8A, F8B, and F9.9A/FT9.9A series. It is also used for the remote oil tanks on all Yamaha 2-Stroke and HPDI models. Additionally, this filter is compatible with Mercury 9.9 HP 2-Stroke outboards (1995-1998).

It serves as a direct replacement for multiple OEM and aftermarket parts, ensuring broad compatibility for routine maintenance and repairs.

  • Fuel Type: Compatible with gasoline and ethanol-blended fuels.
  • Simple Installation: Designed for inline installation under the engine cowl.
  • Visual Inspection: Features a translucent housing to easily monitor fuel flow and debris.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number Superseded By
Yamaha 646-24251-00-00 646-24251-01-00
Yamaha 646-24251-01-00 646-24251-02-00
Yamaha 646-24251-02-00
Mercury 35-80365M
Sierra 18-7713
Mallory 9-37969
Recmar PAF4-05000300

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Yamaha 4A, 4B 4 2-Stroke 1989-1999 646-24251-01-00/646-24251-02-00
Yamaha 5C 5 2-Stroke 1997-2002 646-24251-01-00/646-24251-02-00
Yamaha 6C, 6D 6 2-Stroke 1986-2000 646-24251-01-00/646-24251-02-00
Yamaha 8C 8 2-Stroke 1989-2001 646-24251-01-00/646-24251-02-00
Yamaha F4A 4 4-Stroke 1999-2008 646-24251-01-00/646-24251-02-00
Yamaha F8A, F8B 8 4-Stroke 1999-2002 646-24251-01-00/646-24251-02-00
Yamaha F9.9A, F9.9BA 9.9 4-Stroke 1989-2002 646-24251-01-00/646-24251-02-00
Yamaha FT9.9A 9.9 4-Stroke 1988-1990 646-24251-01-00/646-24251-02-00 High thrust model
Yamaha All Two-Stroke Models Various 2-Stroke Various 646-24251-01-00/646-24251-02-00 Used on remote oil tanks
Yamaha HPDI Models Various 2-Stroke Various 646-24251-01-00/646-24251-02-00 Used on remote oil tanks
Mercury 9.9 9.9 2-Stroke 1995-1998 35-80365M

Technical Specifications

Specification Value
Product Type Inline Fuel Filter
Installation Inline (under cowl)
Fuel Type Gasoline (including ethanol blends)
Connection Inline fuel line connection
Housing Material Marine-grade plastic
Housing Color Translucent
Fitting Type Barbed hose connectors
Thread Size N/A (press-fit)
Other Technical Attributes Directional flow (arrow must point toward fuel pump)

Package Contents

  • 1 x Inline Fuel Filter (Replaces 646-24251-01-00/646-24251-02-00)

Explosion Diagram

Explosion Diagram

Installation Guide

  1. Safety First: Shut off the fuel supply at the tank and disconnect the battery.
  2. Locate Filter: Find the existing fuel filter, which is typically under the engine cowl in the main fuel line.
  3. Note Flow Direction: Look for an arrow on the old filter indicating the direction of fuel flow. It must point toward the engine.
  4. Prepare for Removal: Place a rag or towel under the filter to catch any fuel that may spill.
  5. Remove Old Filter: Using pliers, carefully loosen and slide the hose clamps off both ends of the filter. Gently twist and pull the fuel lines off the filter.
  6. Install New Filter: Attach the fuel lines to the new filter, ensuring the arrow on the new filter points in the correct direction (toward the fuel pump).
  7. Secure Connections: Slide the hose clamps back into position over the hose barbs to secure the lines.
  8. Final Check: Prime the fuel system using the primer bulb until firm. Check thoroughly for any leaks around the filter and connections before starting the engine.

Troubleshooting & FAQ

Q: How do I confirm this filter fits my specific engine?

A: First, review the "Compatible Engine Models" table to see if your model and year range are listed. Then, cross-reference your existing part number with our "Part Number Cross-Reference" table. For added confidence, use the serial number guides for Yamaha and Mercury linked above to pinpoint your exact engine details.

Q: What are the symptoms of a clogged or failing fuel filter?

A: Common signs include difficulty starting, engine sputtering or stalling at low speeds, rough idling, hesitation during acceleration, and an overall loss of engine power. The translucent housing on this filter allows for a quick visual check for water or debris.

Q: How often should I replace my outboard's fuel filter?

A: For preventative maintenance, it is best practice to replace the fuel filter annually or every 100 hours of use, whichever comes first. Refer to your engine’s service manual for the manufacturer-recommended interval.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

Exclusive for new customers

10% OFF

Enter the discount code “WELCOMEJLM” on the checkout page to receive your exclusive new customer discount!

Recently Viewed Products