Fuel Filter – Fits Tohatsu/Nissan 9.9-90HP (Replaces 3B7-02230-0, 61N-24560-00, 18-79910)

$16.68 $26.00

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Fuel Filter – Fits Tohatsu/Nissan 9.9-90HP (Replaces 3B7-02230-0, 61N-24560-00, 18-79910) is backordered and will ship as soon as it is back in stock.

Worry-free returns

You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

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 in-line Fuel Filter – Fits Tohatsu/Nissan Outboard 9.9-90HP (Replaces 3B7-02230-0) is engineered to protect your marine engine by removing water and other contaminants from your fuel supply. It is designed for a broad range of Tohatsu/Nissan (9.9–90HP), Yamaha (15–80HP), and select Mercury/Mariner (8–40HP) outboard motors, ensuring clean fuel delivery for optimal performance.

This filter serves as a direct interchange for Tohatsu 3B7-02230-0/3AD-02230-0, 3AC-02230-0, Sierra 18-79910/18-7735, Mallory 9-37965, and Yamaha 61N-24560-00.

Simple in-line installation with barbed hose fittings.
Effectively separates water and contaminants from gasoline.
Compatible with 6mm (1/4") fuel hoses and M8 thread connections.

Part Number Matrix

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

Brand	Part Number	Superseded By
Tohatsu	3B7-02230-0	3AD-02230-0
Tohatsu	3AD-02230-0
Tohatsu	3AC-02230-0
Sierra	18-79910
Sierra	18-7735
Mallory	9-37965
Yamaha	61N-24560-00

Engine & Model Compatibility

Confirm your engine model/year in the table below.

For Tohatsu/Nissan Owners: This filter fits various 2-stroke and 4-stroke models from 6HP to 90HP. Please check your specific model and year against the table.

For Yamaha Owners: Compatible with a range of 15-80HP, 2-stroke and 4-stroke engines that use M8 thread and 6mm fuel hose connectors under part number 61N-24560-00.

For Mercury/Mariner Owners: Fits select 8HP, 15HP, 25HP, and 40HP models where fittings are compatible. Verification against your original part is recommended.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Tohatsu	6	6		1989, 1992–99	3B7-02230-0	Superseded by 3AD-02230-0
Tohatsu	8	8		1989–99, 2001–02	3B7-02230-0	Superseded by 3AD-02230-0
Tohatsu	F4	4	4-Stroke	1999–02	3B7-02230-0	Superseded by 3AD-02230-0
Tohatsu	F9.9	9.9	4-Stroke	1989–95, 1997–99, 2001–02	3B7-02230-0	Superseded by 3AD-02230-0
Tohatsu	FT 9.9	9.9		1988–90	3B7-02230-0	Superseded by 3AD-02230-0
Tohatsu	MFS25/MFS25B/MFS30	25-30	4-Stroke		3B7-02230-0	Superseded by 3AD-02230-0
Yamaha	Various Compatible Models	15-80	2-Stroke & 4-Stroke		61N-24560-00	Models with M8 thread and 6 mm fuel hose connectors
Mercury	8K	8				Models with compatible fittings
Mercury	15K	15				Models with compatible fittings
Mercury	25K	25				Models with compatible fittings
Mercury	40K	40				Models with compatible fittings

Technical Specs

Product Type: Fuel Filter / Water Separator
Installation: In-line
Fuel Type: Gasoline
Connection: 6mm fuel hose connections with M8 thread
Housing Color: Clear/White
Fitting Type: Barbed hose fittings
Thread Size: M8
Other Technical Attributes: Designed to remove water and contaminants from fuel

What’s in the Box

1 x Cartridge Fuel Filter (3B7-02230-0/3AD-02230-0)

Installation Notes

Turn off the engine and the fuel supply valve. Allow the engine to cool completely.
Place an absorbent rag beneath the old filter to catch any fuel spillage.
Carefully loosen the clamps and disconnect the fuel hoses from the old filter. Note the direction of the fuel flow arrow if present.
Remove the old filter from its mounting bracket.
Install the new filter, ensuring the fuel flow direction matches the original setup.
Securely attach the fuel hoses to the new filter and tighten the clamps.
Turn the fuel supply back on and prime the engine if necessary.
Start the engine and carefully inspect for any leaks around the filter and connections. Address any leaks immediately.

Troubleshooting & FAQ

How do I know if this filter fits my engine?

The best way to ensure a match is to compare your original part's specifications, including part number, dimensions, and connection type, with the information in our listing. Cross-reference the part number and check the compatibility table for your engine model and year. When in doubt, visual comparison is key.

What are the signs of a clogged or failing fuel filter?

Common symptoms include engine sputtering, difficulty starting, rough idling, reduced power, or stalling, especially under load. If you suspect a clog, it is safest to replace the filter.

How often should this fuel filter be replaced?

For optimal engine health, we recommend replacing the fuel filter at least once per season or every 100 hours of operation, whichever comes first. Refer to your engine's service manual for manufacturer-specific maintenance intervals.

Is this filter suitable for both 2-stroke and 4-stroke engines?

Yes, this filter is compatible with both 2-stroke and 4-stroke gasoline engines as specified in the compatibility tables. It is designed for carbureted and EFI systems within the listed horsepower ranges.

What is the correct installation orientation?

Always install the filter following the fuel flow from the tank to the engine. If the filter has a flow direction arrow printed on it, ensure it points toward the engine.

What's the difference between OEM and this aftermarket part?

This is an aftermarket replacement part, not sourced from the original equipment manufacturer (OEM). It is built to meet or exceed OEM specifications using comparable, high-quality materials. Our parts are produced in an ISO 9002 certified facility and undergo batch inspections to ensure consistent quality and fitment.

What are your shipping speeds and costs?

We ship worldwide, with typical transit times of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.

What is the warranty and return policy?

This product is covered by a 1-year warranty against manufacturing defects under normal marine use. Should an issue arise, please contact our support team with your order details. Returns are accepted for unused items in their original condition within our standard return window. See our full policy page or contact us 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.

Payment & Security

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