BOLEWIN Marine Spin-On Fuel Filter Water Separator Kit - Spin-On Cartridge & Head for Outboards, Water-Separating Protection

BOLEWIN's Marine Spin-On Fuel Filter Water Separator Kit is a complete aftermarket assembly that removes water and debris from outboard fuel systems to protect injectors and carburetors.

This kit brings together a durable filter head, a spin-on water-separating fuel filter, necessary fittings, and sealing tape so you can replace worn or failing fuel filtration components quickly. Designed as an aftermarket interchange for several OEM part numbers, the assembly is intended for most marine outboard engines where water contamination, rust, and particulate ruin performance or shorten engine life. The compact spin-on design is straightforward to service and helps make routine maintenance faster while preserving fuel system integrity.

How does this kit protect my outboard engine?

The separator captures free water and traps solid contaminants before they reach sensitive fuel system parts like carburetors and injectors. By removing water and particles, it reduces corrosion and the risk of fuel starvation under load, helping maintain consistent engine power. The spin-on filter media is formulated to separate and hold moisture while allowing fuel flow.

• Water-separating media that sheds free water into the bowl for drainage
• Spin-on cartridge for quick replacement without complex tools
• Included fittings and tape for a leak-resistant installation
• Compatible with many common outboard OEM part numbers for easy cross-reference

Which engines and part numbers is this compatible with?

This BOLEWIN kit is built as a drop-in aftermarket option for a range of commonly used marine filter part numbers. It fits most outboard applications that use the referenced spin-on style filter head and cartridge, making it a versatile replacement choice. Always cross-check your original part number to confirm fit before purchase.

• Direct interchange for 35-52456A1, 35-807172A4, 35-55501A1, 35-57250A1
• Compatible with 35-60494A4, 35-805269A4, 35-802893T and related references
• Also listed versus 18-7848-1, 18-7983-1, 9-37850, 9-7851, 24951, 24950
• Works with many popular marine outboard fuel systems that accept spin-on separators

What’s included and how easy is installation?

The kit contains the filter head, a spin-on water-separating filter cartridge, fittings to match common fuel lines, and rubber sealing tape for threaded connections. Installation is typically straightforward: drain the bowl, unscrew the old cartridge, fit the new head if required, wrap threads, and hand-tighten the spin-on unit. Routine service intervals depend on fuel quality and operating hours but are simple to perform in the boat or onshore.

• Filter head and spin-on cartridge included for immediate replacement
• Fittings supplied to adapt to standard marine fuel lines
• Rubber tape helps prevent leaks at threaded joints
• Hand-tightenable spin-on design for fast field servicing

How does it improve fuel system maintenance and longevity?

By catching water and particles before they reach pumps and injectors, the separator reduces wear and the likelihood of fuel-related failures. Cleaner fuel flow helps maintain throttle response and reduces the frequency of injector or carburetor cleaning. The replaceable spin-on cartridge design also lowers long-term maintenance costs by simplifying periodic changes.

• Reduces contaminant-induced wear on pumps and injectors
• Simplifies routine filter changes with a spin-on cartridge
• Helps maintain consistent fuel flow and engine performance
• Aftermarket pricing often lowers replacement costs versus OEM

Who is this for: This BOLEWIN Marine Spin-On Fuel Filter Water Separator Kit is aimed at boat owners, marine mechanics, and fleet operators who service outboard engines and want an affordable, effective aftermarket replacement. It's particularly useful for vessels operating in variable fuel-quality environments or saltwater conditions where water contamination is a frequent concern. If you need a straightforward swap for the listed part numbers or want a robust spin-on separator for routine maintenance, this kit is designed to be a practical, service-friendly choice.