Volvo Penta Marine Fuel Filter & Water Separator 3847644 — 6µm High‑Capacity, 1.25in Taller OEM Replacement

Genuine Volvo Penta fuel filter and water separator part 3847644 removes water and particulates from marine diesel before they reach the engine. This OEM Volvo Penta component is a direct-replacement water-separating fuel filter designed for marine diesel applications. It provides a high-capacity filter element with 6-micron filtration and is 1.25 inches taller than the earlier 3862228 model, offering additional contaminant holding capacity. The unit supersedes parts 3862228, 3852413, and 3851218, so it fits applications that previously used those numbers — but always confirm fitment against your engine serial and installation space before purchasing.

How does this filter protect a marine engine?

The 3847644 separates free water and traps particles down to 6 microns so contaminants are less likely to enter sensitive fuel system components. Cleaner fuel helps reduce injector wear and keeps combustion more consistent without making any service-time promises.

• 6‑micron filter media captures fine particulates.
• Water separation reduces free water carried in fuel lines.
• High-capacity design holds more debris between changes.

What physical differences should I expect compared with older Volvo Penta filters?

This genuine part is 1.25 inches taller than the standard 3862228 unit, giving it more internal filter area and holding capacity. It directly supersedes and replaces the Volvo Penta part numbers 3862228, 3852413, and 3851218, so it’s intended for installations that accepted those earlier filters but confirm clearance and connector compatibility first.

• Dimensions: approximately 1.25 in. taller than part 3862228.
• Supersedes: 3862228, 3852413, 3851218.
• OEM designation: Volvo Penta part number 3847644.

How do I install and service this fuel filter safely?

Installation follows normal fuel-filter replacement practice: relieve fuel system pressure, drain water from the bowl, and use the correct torque on fittings. Replace the element at manufacturer-recommended intervals and inspect seals and gasket surfaces to prevent leaks—always dispose of used fuel and filters according to local regulations.

• Bleed the fuel system per your engine manual after replacement.
• Check O-rings and sealing surfaces for damage before fitting.
• Drain separated water regularly from the filter bowl during operation.

Which engines and situations is this filter intended for?

As an OEM Volvo Penta part, 3847644 is built for marine diesel applications that require water separation and fine particulate filtration. It’s suited to recreational and commercial vessels where fuel cleanliness is important and where the older listed part numbers were previously used. Always verify compatibility with your specific engine model and installation constraints before ordering.

• Designed for Volvo Penta marine diesel installations.
• Suitable where previous parts 3862228, 3852413, or 3851218 were used.
• Useful for boats needing enhanced contamination capacity and water separation.

Who is this for? If you maintain Volvo Penta-powered boats or operate a fleet that uses OEM components, this genuine Volvo Penta 3847644 filter is for owners and technicians who prefer factory-specified parts for fuel filtration and water separation. It’s especially relevant when replacement clearance allows for the slightly taller, higher-capacity cartridge; if space or connector type differs, check part compatibility against your engine serial number and installation geometry before purchase.

FAQ

Q: Does part 3847644 replace 3862228?

A: Yes. Volvo Penta part 3847644 supersedes and replaces 3862228, as well as 3852413 and 3851218.

Q: What is the filtration rating of this fuel filter?

A: The filter media is rated at 6 microns for particulate filtration and includes water-separating capability.