Volvo Penta Fuel Filter 21718912 | OEM D4 D6 Diesel Water-Separating Filter
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Volvo Penta OEM Fuel Filter — D4 / D6 Diesel Water-Separating Filter
Part Number: 21718912 | SKU: 21718912
Brand: Volvo Penta | Official Product Type: Fuel Filter (Water-Separating, Spin-On)
System: Fuel Delivery System
Supersedes: 3583443
The genuine Volvo Penta OEM spin-on fuel filter for D4 and D6 diesel marine engines. This water-separating filter removes water, dirt, and fuel contaminants before they reach the injection system — protecting injectors, fuel pumps, and other precision fuel components from damage. Features a threaded port for the EVC water-in-fuel sensor, maintaining full compatibility with Volvo Penta’s electronic monitoring system.
Key Features
- Genuine Volvo Penta OEM fuel filter — factory fit and filtration specification
- Water-separating design removes water, dirt, and contaminants from diesel fuel
- Spin-on design for straightforward replacement during routine service
- Threaded port for EVC water-in-fuel sensor — maintains full electronic monitoring compatibility
- Engineered for the operating demands of Volvo Penta marine diesel engines
- Supersedes earlier part number 3583443
Compatible Applications
- Volvo Penta D4-180, D4-210, D4-225, D4-260, D4-300, D4-320 and related D4 variants
- Volvo Penta D6-280, D6-300, D6-310, D6-330, D6-350, D6-370, D6-380, D6-400, D6-435 and related D6 variants
- Always confirm fitment using your engine serial number — Volvo Penta parts can vary by production run and engine generation
Superseded Part Numbers
Part 21718912 supersedes the following earlier Volvo Penta part number:
- 3583443
If your engine currently uses part 3583443, 21718912 is the current OEM replacement.
Service Interval
Replace the fuel filter at every scheduled engine service — typically every 100 operating hours or annually, whichever comes first. Replace immediately if the water-in-fuel warning light activates or if fuel contamination is suspected. Refer to your Volvo Penta engine operator’s manual for the service interval specific to your engine model.
Installation Notes
- Transfer the water-in-fuel sensor from the old filter to the new one before installation — the sensor is reusable
- Apply a thin film of clean diesel fuel to the filter gasket before installation
- Hand-tighten only — do not over-torque the spin-on filter
- Prime the fuel system after filter replacement to purge air before starting the engine
- Check for leaks after the first start following installation
- Dispose of the used filter and any collected water/fuel according to local environmental regulations
Parts Desk Insights
Best Use Case: This is a standard annual maintenance item for Volvo Penta D4 and D6 diesel owners. It’s most commonly ordered as part of a 100-hour or seasonal service alongside the oil filter and air filter. The water-separating function is especially important for boats that sit between uses or operate in areas where fuel quality varies — water in diesel fuel is one of the leading causes of injector damage.
Common Questions: The most frequent question is about the water-in-fuel sensor — the sensor from the old filter is reusable and must be transferred to the new filter before installation. Customers also ask about the superseded part number: if you’ve been ordering 3583443, 21718912 is the current replacement. If your EVC system is showing a water-in-fuel warning, replace the filter and drain any accumulated water before clearing the alarm.
Technical FAQ
Q: Do I need to replace the water-in-fuel sensor when I change the filter?
A: No — the sensor is reusable. Remove it from the old filter and install it in the new one. Inspect the sensor O-ring and replace if worn.
Q: My EVC is showing a water-in-fuel warning. Is this the right filter?
A: Yes — replace the filter and drain any accumulated water from the filter housing. If the warning persists after replacement, inspect the fuel tank and supply lines for contamination.
Q: How do I prime the fuel system after replacing the filter?
A: Use the manual fuel priming pump (if equipped) or follow the bleeding procedure in your Volvo Penta engine service manual for your specific D4 or D6 engine variant.
Q: My engine uses part 3583443 — is 21718912 the correct replacement?
A: Yes — 21718912 is the current Volvo Penta OEM part that supersedes 3583443.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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