AULDAY Marine Fuel Filter & Water Separator S3213 with Clear Bowl — 3-Layer Synthetic Media, Direct-Fit Replacement

The AULDAY S3213 is a direct-fit marine fuel filter and water separator with a transparent collection bowl that removes water and contaminants to protect outboard engines.

Designed as a like-for-like replacement for common OEM part numbers (35-60494-1, S3213, 18-7932-1, 35-809097 and others), this AULDAY unit pairs multi-layer filtration media with a see-through bowl so you can inspect collected water and debris without disassembling the system. Built from synthetic fiber filter media with an Italian three-layer paper element, the S3213 aims to keep fuel clean and reduce injector, pump, and cylinder wear while offering a straightforward plug-and-play swap for most marine outboard fuel lines.

How does the S3213 separate water from fuel?

The visible bowl beneath the filter element collects free water and heavier particulates, while the three-layer synthetic paper captures smaller contaminants as fuel passes through. This two-stage approach reduces the amount of moisture and debris reaching the engine’s fuel system.

• Clear plastic bowl for quick visual checks of water and sediment.
• Three-layer synthetic filter media traps fine particles effectively.
• Gravity-assisted water drainage via the lower bowl design.

Will this fit my outboard—what parts does it replace?

The S3213 is designed for direct replacement of many OEM fuel filter part numbers used on marine outboards. It installs without electrical changes and is intended as a drop-in swap for compatible models that list the referenced OEM codes.

• Replaces: 35-60494-1, S3213, 18-7932-1, 18-7928 variants, 35-809097, and more.
• Plug-and-play installation—no wiring or modifications required.
• Check engine documentation or compare part numbers before ordering.

How do I install and prime the S3213 correctly?

Installation is straightforward: remove the old filter, fit the new unit in the same orientation, then prime the fuel side before starting. Always avoid introducing air into the system—fill the inlet side with clean fuel and follow your engine’s priming steps to remove trapped air.

• Do not reuse the old filter element; always replace with a new S3213.
• Pre-fill the inlet side with clean fuel before first start-up.
• After installation, prime the fuel system and run the engine briefly while checking for leaks.

What materials and durability features does this filter offer?

The AULDAY S3213 uses a three-layer synthetic fiber paper sourced from Italy to balance particle capture with fuel flow. The housing and transparent bowl are built to withstand marine environments and permit visual monitoring of accumulated water and sediment.

• Synthetic multi-layer filter media for consistent filtration performance.
• Clear collection bowl for visual contamination checks without disassembly.
• Durable housing intended for typical marine operating conditions.

Who is this for: The AULDAY S3213 fuel filter is for boat owners, mechanics, and marine technicians who need a reliable, easy-to-install replacement filter that removes water and particulates before they reach sensitive fuel system components. It’s suited for outboard engines that reference any of the compatible OEM part numbers, and for anyone who prefers a visible bowl to monitor contamination between service intervals.

Package contents include one AULDAY S3213 marine fuel filter. AULDAY provides a 12-month limited warranty and lifetime technical support; contact the seller for assistance with fitment or installation guidance.