Fuel Filter – Fits Yanmar 6LP & 6LPA Series Engines (Replaces 119773-55510)
Fuel Filter – Fits Yanmar 6LP & 6LPA Series Engines (Replaces 119773-55510) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Fuel Filter – Fits Yanmar 6LP & 6LPA Series Engines (Replaces 1...
Product Details
This high-efficiency Fuel Filter – Fits Yanmar 6LP & 6LPA Series Engines is designed for all production years of Yanmar 6LP and 6LPA series marine diesel engines (250–315 HP, 4-Stroke). It ensures your engine receives clean fuel, protecting critical components from contaminants.
It serves as a direct replacement for Yanmar part numbers 119773-55510 and 119773-55710-12, and interchanges with Fleetguard FF5159.
- Spin-on installation for quick and easy replacement.
- Engineered for use with diesel fuel systems.
- Includes a new O-ring gasket to ensure a leak-free seal.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Yanmar | 119773-55510 | 119773-55710-12 |
| Yanmar | 119773-55710-12 | |
| Fleetguard | FF5159 |
Engine & Model Compatibility
Confirm your engine model/year in the table below. This filter is compatible with a wide range of Yanmar 6LP and 6LPA series engines:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yanmar | 6LP-DT | 250 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-DTE | 250 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-DTZE | 250 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-DTZY | 250 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-ST | 300 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-STE | 300 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-STZE | 300 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LP-STZY | 300 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LPA-DTE | 250 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LPA-DTP | 260 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LPA-STE | 300 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
| Yanmar | 6LPA-STP | 315 | 4-Stroke | All | 119773-55510 | Superseded by 119773-55710-12 |
Technical Specs
- Product Type
- Diesel Fuel Filter
- Installation
- Spin-On
- Fuel Type
- Diesel
- Connection
- Threaded
- Housing Material
- Metal
- Dimensions
- Height: 145 mm (5 11/16"), Diameter: 120 mm (4 3/4")
- Weight
- 0.66 kg (1.45 lb)
- Fitting Type
- Spin-On
- Thread Size
- Filter Thread: 3/4-16, Port Thread: M36 x 1.5
What’s in the Box
- 1 x Fuel Filter (equivalent to 119773-55710-12)
- 1 x O-Ring Gasket
Installation Notes
- Shut off the fuel supply and place a drain pan under the filter.
- Using a filter wrench, unscrew the old filter counter-clockwise. Be prepared for some fuel spillage.
- Clean the filter mounting base on the engine, ensuring the sealing surface is free of old gasket material and debris.
- Lightly lubricate the new filter's O-ring gasket with clean diesel fuel or motor oil.
- Carefully spin the new filter onto the housing by hand until the gasket makes contact.
- Tighten the filter an additional 3/4 to one full turn by hand. Do not overtighten.
- Restore the fuel supply and prime the fuel system according to the engine manufacturer's instructions.
- Start the engine and check for any leaks around the filter. If leaks are found, stop the engine and re-check the installation.
Troubleshooting & FAQ
Will this filter fit newer Yanmar 6LPA-STP2 engines?
Yes. This filter is a direct equivalent for the superseded Yanmar part number 119773-55710-12, which is specified for all 6LP and 6LPA series engines, including the 6LPA-STP2, 6LPA-STZP2, and 6LPA-STZP3 models.
What is the difference between Yanmar part 119773-55510 and 119773-55710-12?
Part number 119773-55510 was the original filter for most 6LP series engines. It has been superseded by 119773-55710-12, which offers broader compatibility with newer engine models. This aftermarket filter is designed to meet or exceed the specifications for both part numbers.
How often should I replace this fuel filter?
For optimal engine protection, we recommend replacing the fuel filter as part of your regular maintenance schedule, typically every 250 operating hours or annually, whichever comes first. Refer to your Yanmar engine's service manual for specific interval recommendations.
What are the signs of a clogged fuel filter?
Common symptoms of a failing or clogged fuel filter include engine hesitation, loss of power, difficulty starting, rough idling, or stalling under load. If you experience these issues, the fuel filter is a primary component to inspect and replace.
Is the O-ring gasket included?
Yes, a new O-ring gasket is included with every filter to ensure a proper, leak-proof seal during installation.
What is the filtration rating (in microns)?
While the exact micron rating is not published, this filter is manufactured to meet or exceed OEM specifications for filtration efficiency, effectively removing harmful contaminants to protect your fuel injection system.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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