DZFST.FI S3213 Fuel Water Separator Filter - 10 Micron Marine Outboard Replacement, Three-Layer Synthetic Media

If you operate a boat with an outboard engine, clean fuel is essential for steady performance and long-term reliability. The DZFST.FI S3213 fuel water separator is engineered for marine use and matches multiple OEM numbers so you can swap it in quickly. It uses a three-layer synthetic filter media to capture particles and separate water, helping to reduce injector and pump wear while keeping combustion cleaner.

How does this filter protect my outboard on the water?

The separator removes water and traps solid contaminants before they reach sensitive fuel system components. That lowers the risk of corrosion, injector clogging, and inconsistent engine operation without altering fuel flow characteristics when installed correctly.

• 10-micron filtration rating catches fine particulates.
• Three-layer synthetic fiber media enhances dirt-holding capacity.
• Water-separating design sheds free water to protect pumps and injectors.

Will it fit my engine and which part numbers does it replace?

This unit is a plug-and-play replacement compatible with many outboard setups; it’s matched to common OEM references to simplify ordering. Confirm fit by comparing dimensions and the replacement numbers listed with your existing filter.

• Replaces S3213, 35-60494-1, 18-7932-1, 18-17928, 35-809097 and similar codes.
• Works with a wide range of Mercury, Yamaha and other marine outboard applications.
• Direct-fit design for straightforward swap without modification.

What are the installation and maintenance best practices?

Install the filter as a straightforward replacement, pre-filling the clean side with fuel to avoid air locks. Do not reuse an old element; replacing worn filters prevents damage and maintains consistent fuel delivery.

• Pre-fill the clean side with fresh fuel before installation.
• Prime the system and run the engine, then inspect for leaks.
• Replace at regular service intervals or when contamination is visible.

What materials and performance features does this separator use?

The cartridge contains an Italian-made, three-layer synthetic filter paper that balances filtration efficiency with flow. The construction is intended to trap debris while letting fuel pass freely, supporting efficient combustion and reducing wear in the fuel system.

• High-quality synthetic fiber media sourced from Italy for reliable filtration.
• Layered design improves dirt capacity without sacrificing flow.
• Designed for marine environments where water contamination is common.

Who is this for: Boat owners, marine technicians, and DIYers who need a dependable 10-micron fuel/water separator that directly replaces common outboard filter part numbers. Ideal for operators of Mercury and Yamaha outboards or any vessel that requires robust fuel filtration to reduce fuel-system wear and maintain engine performance. If you require a straightforward, OEM-compatible replacement element with a water-separating function, the DZFST.FI S3213 offers a practical, service-friendly solution.