CARMOCAR Fuel Filter Water Separator Inline Assembly S3227 — 3/8" Barb x 1/4" NPT, 10‑Micron Clear Bowl

The CARMOCAR S3227 is a compact fuel filter and water-separator assembly with a clear bowl and 3/8" barb x 1/4" NPT fittings designed to remove water and particulates from fuel systems.

This inline assembly combines a replaceable 10-micron synthetic filter element with a transparent collection bowl so you can quickly see contamination and drain water without disassembly. Built for universal fuel applications—commonly used on outboard marine engines—the unit installs in minutes using the included barb and NPT connection points. Its corrosion-resistant housing and standard fittings make it compatible with many small-engine and marine fuel systems where a reliable pre-filter and water separator are needed.

How does the S3227 protect my engine?

The S3227 captures water and solid particles before they reach fuel pumps, injectors, or carburetors, reducing the risk of clogs and abrasive wear. The 10-micron synthetic media traps fine contaminants while the clear bowl collects separated water for visible inspection and routine draining.

• 10-micron synthetic fiber filter for fine particle removal
• Transparent collection bowl for easy visual checks
• Separates and drains free water to prevent fuel contamination
• Resistant housing protects against corrosion and fuel exposure

Will it fit my fuel system and how do I install it?

It fits many universal fuel setups and is especially suited to outboard engines; the assembly uses a 3/8" barb inlet/outlet and a 1/4" NPT fitting for secure mounting. Installation is plug-and-play—no electrical work required—so you can mount and connect it inline with common fuel hose and fittings.

• 3/8" barb connections for standard fuel hose attachment
• 1/4" NPT threads for mounting or accessory connections
• Direct inline installation; no wiring or modification needed
• Check OEM compatibility and part numbers (see replacements) before purchase

How do I maintain the filter and clear bowl?

Maintenance is straightforward: inspect the clear bowl regularly, drain accumulated water, and replace the filter element when clogged or at scheduled intervals. The transparent design makes it easy to see contaminants so you can take action before fuel delivery is affected.

• Visually inspect bowl during pre-start checks
• Open drain port to remove trapped water—follow safe fuel-handling procedures
• Replace filter element when visibly dirty or per service schedule
• Clean or replace housing seals if leaking or degraded

What parts does this assembly replace and what’s included?

The CARMOCAR S3227 is a compatible replacement for several common OEM numbers and ships as a complete assembly with the clear bowl and 3/8" barb x 1/4" NPT fitting already installed. Confirm fitment with your equipment’s part list to ensure interchangeability.

• Replaces: S3227, 18-7948, 9-37882 and filters like 490R-RAC-01, 320R-RAC-01
• Clear bowl replacements referenced: 18-7922, 18-7922-1
• Package contains one assembled S3227 unit with fittings
• One-year customer service support from CARMOCAR

Who is this for: The CARMOCAR S3227 suits boat owners, small-engine mechanics, and anyone running portable or outboard fuel systems who needs a compact, visible water-separator and particle filter. If you want a low-profile, easy-to-service inline unit with common fittings and a clear bowl for quick inspections, this assembly is designed for that use. Always verify compatibility with your engine or equipment manual before installation.