Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder Engines (Replaces 35-49088A2, 312456)
Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder Engines (Replaces 35-49088A2, 312456) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder E...
Product Details
This Sierra Marine Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder Engines is designed for use with Mercruiser, Mercury, Chris-Craft, and OMC inline 4 & 6 cylinder engines equipped with AC fuel pumps.
It serves as a direct interchange for Chris-Craft 16.83-90006, Mercruiser 35-49088A2 and 35-49088Q2, OMC 312456 and 381690, and several aftermarket equivalents including Sierra 18-7860.
- Installs in-line with AC-type fuel pumps.
- Specifically designed for fuel pumps that have the element canister on top of the pump.
- Engineered for gasoline fuel systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Chris-Craft | 16.83-90006 |
| Mercruiser | 35-49088A2 |
| Mercruiser | 35-49088Q2 |
| OMC | 312456 |
| OMC | 381690 |
| Fram | CG7 |
| Sierra | 18-7860 |
| Mallory | 9-37820 |
| GLM | 24880 |
| Wix | 33943 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercruiser applications, this filter fits inline 4 and 6-cylinder engines using AC fuel pumps.
| Brand | Model | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Mercruiser | Inline 4 cylinder engines | 4-Stroke | 35-49088A2, 35-49088Q2 | With AC fuel pumps |
| Mercruiser | Inline 6 cylinder engines | 4-Stroke | 35-49088A2, 35-49088Q2 | With AC fuel pumps |
For OMC applications, this filter is compatible with the following models and years.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| OMC | 150 CID | 4-Stroke | 1982–1986 | 312456, 381690 | All models |
| OMC | 181 CID | 4-Stroke | 1982–1989 | 312456, 381690 | All models |
| OMC | 302AMRPWC | 4-Stroke | 1990 | 312456, 381690 | |
| OMC | 302APRPWC | 4-Stroke | 1990 | 312456, 381690 |
Technical Specs
- Product Type
- Fuel Filter
- Installation
- In-line, used with AC fuel pumps
- Fuel Type
- Gasoline
- Dimensions
- 51 mm (2") length × 38 mm (1-1/2") diameter
- Other Technical Attributes
- For fuel pumps that have the element can on top of the pump
What’s in the Box
- 1 x Fuel Filter with gasket (Sierra 18-7860)
Installation Notes
- Disconnect the battery and work in a well-ventilated area away from any ignition sources.
- Locate the old fuel filter and place a rag or container underneath to catch any spilled fuel.
- Relieve the fuel system pressure according to the engine's service manual.
- Carefully loosen the clamps or fittings securing the fuel lines to the filter.
- Remove the old filter, noting the direction of the fuel flow arrow printed on its housing.
- Install the new filter, ensuring the flow arrow points toward the engine.
- Securely tighten all fuel line clamps or fittings. Do not overtighten.
- Once installed, prime the fuel system if required by your engine's specifications.
- Reconnect the battery, start the engine, and carefully inspect all connections for leaks.
Troubleshooting & FAQ
How do I know if this fuel filter fits my engine?
First, check the Part Number Matrix to see if your old filter's part number is listed. Second, review the Engine & Model Compatibility tables. This filter is specifically designed for Mercruiser and OMC inline 4 & 6 cylinder engines with AC fuel pumps.
What are the signs of a clogged or failing fuel filter?
Common symptoms include engine hesitation under acceleration, difficulty starting, rough idling, reduced overall power, and engine stalling, especially under load.
How often should I replace my fuel filter?
As a general best practice, marine fuel filters should be replaced at least once per season or every 100 hours of operation, whichever comes first. Always consult your engine's service manual for the recommended maintenance schedule.
Is the gasket included with the filter?
Yes, this fuel filter kit includes the necessary gasket for a complete installation. Please see the "What’s in the Box" section for a full list of contents.
What is the difference between an OEM and an aftermarket part?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is built to meet or exceed OEM-level specifications using comparable materials. Our parts are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency.
What are your shipping speeds and costs?
We offer fast worldwide shipping, with a typical transit time 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 your warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our full policy page or reach out for return instructions.
Safety & Important Info
- Verify images and specifications against 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 quality control.
Payment & Security
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