Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder Engines (Replaces 35-49088A2, 312456)

Fuel Filter – Fits Mercruiser & OMC Inline 4 & 6 Cylinder Engines

This high-quality Sierra Marine fuel filter is designed for use with Mercruiser, Mercury, Chris-Craft, and OMC inline 4 and 6-cylinder engines equipped with AC fuel pumps. It ensures clean fuel delivery by effectively filtering out contaminants before they can reach your engine, promoting reliability and performance.

It serves as a direct replacement for Chris-Craft 16.83-90006, Mercruiser 35-49088A2/35-49088Q2, OMC 312456/381690, and other equivalent aftermarket part numbers.

• Installation Type: Installs in-line for gasoline engines with AC fuel pumps.
• Dimensions: 51 mm (2") length × 38 mm (1-1/2") diameter.
• Compatibility: For fuel pumps that have the element can on top of the pump.

Part Number Cross-Reference

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

Compatible Engine Models

Confirm your engine model/year in the table below.

Mercruiser & Mercury

OMC

Chris-Craft

Technical Specifications

Package Contents

This kit includes:

• 1 x Fuel Filter assembly (Replaces Sierra 18-7860)
• 1 x Gasket

Explosion Diagram

Installation Guide

1. Safety First: Turn off the fuel supply valve and disconnect the battery terminals.
2. Locate Filter: Find the existing fuel filter. Place a shop towel or container underneath to catch any spilled gasoline.
3. Remove Lines: Carefully loosen the hose clamps and disconnect the fuel lines from both ends of the old filter.
4. Note Flow Direction: Observe the arrow on the side of the original filter, which indicates the direction of fuel flow toward the engine.
5. Install New Filter: Position the new filter so its flow arrow matches the original. Reconnect the fuel lines and tighten the clamps securely.
6. Check for Leaks: Reconnect the battery and turn on the fuel supply. Prime the system and carefully inspect the filter and connections for any leaks.
7. Final Check: Once you confirm there are no leaks, start the engine and let it run for a minute while observing for any issues.

Troubleshooting & FAQ

How do I confirm this filter fits my engine?
Start by checking the part number cross-reference table. Then, review the compatible engine models listed for Mercruiser and OMC. It is critical to also visually compare the images and specifications to your existing part, as variations can exist even within the same model year.

What are the signs of a clogged or failing fuel filter?
Common symptoms include difficulty starting, rough idling, stalling, reduced engine power, and poor acceleration. If you notice these issues, a restricted fuel filter may be the cause.

How often should I replace my fuel filter?
As a general guideline, fuel filters should be checked and replaced annually or every 100 hours of operation, whichever comes first. Refer to your engine's service manual for the recommended interval.

OEM vs. Aftermarket?
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.

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

What is your warranty and return policy?
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.