AULDAY S3213 Marine Fuel Water Separator 4-Pack — Direct-Fit Replacement, Three-Layer Synthetic Media

The AULDAY 4PCS S3213 marine fuel filter is a direct-fit fuel/water separator designed to remove contaminants and water from outboard motor fuel for consistent engine performance.

Keep your boat running smoothly with this four-pack of AULDAY S3213 fuel filters, engineered to replace common OEM numbers including 35-60494-1, S3213, and 35-809097. Each filter uses a three-layer synthetic fiber media to trap particles and shed water before contaminants reach the fuel pump or injectors. The set is sold as a plug-and-play replacement to simplify maintenance intervals and protect your outboard from premature wear.

Will these filters fit my outboard motor?

The S3213 filters are manufactured to match the form and function of many OEM water separators and filter cartridges. They list compatibility with multiple part numbers and common marine fitments, making it likely they will work with several brands of outboard engines. Always compare dimensions and OEM references before ordering to ensure a proper match.

• Replaces: 35-60494-1, S3213, 18-7932-1, 18-17928, 35-809097 and related numbers.
• Direct-fit design for plug-and-play replacement—no electrical changes needed.
• Sold as a set of four for staggered service intervals.

How do I install and prime an S3213 fuel filter?

Installation is straightforward: remove the old cartridge, position the new S3213, and reassemble according to your engine manufacturer’s instructions. Pre-fill the replacement filter with clean fuel on the inlet side before final assembly to reduce air ingestion. After installation, prime and start the engine, let it run a few minutes, then inspect for leaks.

• No electrical modifications; plug-and-play cartridge swap.
• Pre-fill the dirty-side chamber with clean fuel before closing the system.
• Prime the fuel system and check for leaks after the engine runs briefly.

What makes the AULDAY S3213 effective at protecting marine engines?

Each filter uses original Italian three-layer filter paper constructed from synthetic fibers that capture both particulate and free water. That dual-action media helps keep fuel delivery components—like pumps, injectors, and cylinders—clean, reducing wear and maintaining efficient combustion. The design targets high-performance marine conditions where water contamination and debris are common concerns.

• Three-layer synthetic fiber media for strong particle retention and water separation.
• Protects pumps, injectors, and internal engine surfaces from contaminants.
• Engineered for higher performance marine applications.

What warranty and support come with the filters?

AULDAY provides a 12-month warranty on these filters and offers lifetime technical support from the shop. If you encounter fitment questions or performance concerns, customer service can assist with troubleshooting and returns within the warranty period.

• 12-month limited warranty included.
• Lifetime technical support from the seller for installation and troubleshooting.
• Sold in a cost-effective four-pack to reduce future purchasing frequency.

Who is this for: Boat owners, marine mechanics, and service shops that need reliable, OEM-compatible fuel/water separators for outboard engines will benefit from the AULDAY S3213 four-pack. It’s suited for routine maintenance schedules and fleet servicing where multiple replacements are required, and for anyone who prefers a straightforward, no-modification swap to restore clean, water-free fuel delivery.