Fuel Filter – Fits Yanmar 4JH & 4LH Series Marine Diesel Engines (Replaces 121857-55710)
Fuel Filter – Fits Yanmar 4JH & 4LH Series Marine Diesel Engines (Replaces 121857-55710) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Fuel Filter – Fits Yanmar 4JH & 4LH Series Marine Diesel Engine...
Product Details
This high-efficiency spin-on Fuel Filter – Fits Yanmar 4JH & 4LH Series Marine Diesel Engines (Replaces 121857-55710) and is designed to ensure clean fuel delivery and protect your engine from harmful contaminants. It is compatible with a wide range of Yanmar marine diesel engines from 45 to 160 HP, including the 4JH45, 4JH57, 4JH80, 4JH110, and various 4LH/4LHA series models.
It serves as a direct interchange for Yanmar part numbers 121857-55710-12 and 121857-55711, offering a reliable replacement for older or superseded filters.
- Features a direct spin-on design for straightforward installation.
- Engineered specifically for use with marine diesel fuel systems.
- Manufactured to meet or exceed OEM specifications for filtration and fit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yanmar | 121857-55710 | Active Replacement Part |
| Yanmar | 121857-55711 | Superseded by 121857-55710 |
| Yanmar | 121857-55710-12 | Superseded by 121857-55710 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This filter is compatible with the following Yanmar marine diesel engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Yanmar | 4JH45 | 45 | 4-Stroke | 121857-55710 |
| Yanmar | 4JH57 | 57 | 4-Stroke | 121857-55710 |
| Yanmar | 4JH80 | 80 | 4-Stroke | 121857-55710 |
| Yanmar | 4JH110 | 110 | 4-Stroke | 121857-55710 |
| Yanmar | 4LH-DTE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-DTZ | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-HT | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-HTE | 140 | 4-Stroke | 121857-55710 |
| Yanmar | 4LH-HTZ | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-HTZAY | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-STE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LH-TE | 110 | 4-Stroke | 121857-55710 |
| Yanmar | 4LHA-DTE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-DTP | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-DTZE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-DTZP | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-HTE | 150 | 4-Stroke | 121857-55710 |
| Yanmar | 4LHA-HTP | 160 | 4-Stroke | 121857-55710 |
| Yanmar | 4LHA-HTZE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-HTZP | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-STE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-STP | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-STZE | 4-Stroke | 121857-55710 | |
| Yanmar | 4LHA-STZP | 4-Stroke | 121857-55710 |
Technical Specs
- Product Type
- Fuel Filter (Spin-on)
- Installation
- Direct replacement, spin-on
- Fuel Type
- Diesel
- Connection
- Threaded spin-on
- Dimensions
- 14.5 cm x 12.0 cm x 12.0 cm
- Weight
- 1 kg (2.2 lb)
- Fitting Type
- Spin-on
What’s in the Box
- 1x Fuel Filter (121857-55710)
Installation Notes
- Shut off the fuel supply valve before beginning.
- Place a suitable container or absorbent rags under the filter to catch any spilled fuel.
- Use a filter wrench to turn the old filter counter-clockwise and remove it.
- Clean the filter mounting base on the engine, ensuring the surface is free of old gasket material and debris.
- Apply a thin layer of clean diesel fuel or motor oil to the gasket of the new filter.
- Carefully spin the new filter onto the mounting base by hand until the gasket makes firm contact.
- Tighten the filter an additional 1/2 to 3/4 of a turn by hand. Do not use a wrench to tighten.
- Open the fuel supply valve.
- Prime the fuel system according to your engine manufacturer’s instructions to remove any air.
- Start the engine and carefully check for any leaks around the filter. If leaks are found, stop the engine and re-check the installation.
Troubleshooting & FAQ
How do I know if this filter fits my Yanmar engine?
This filter is designed for Yanmar 4JH and 4LH series engines. Please check the 'Engine & Model Compatibility' table on this page and compare the OEM part number (121857-55710) with your engine's service manual to ensure an exact match.
What is the recommended replacement interval?
For optimal engine performance and protection, we recommend replacing the fuel filter every 250 service hours or annually, whichever comes first. Refer to your Yanmar engine's maintenance schedule for specific guidance.
What are the signs that my fuel filter needs changing?
Common symptoms of a clogged fuel filter include engine hesitation, loss of power, difficulty starting, or rough idling. A visual inspection may also show sediment or water in the filter bowl if applicable.
Can I install this filter myself?
Yes, this is a spin-on filter designed for straightforward replacement. Basic mechanical skills are sufficient. Please follow our 'Installation Notes' and ensure the fuel system is properly primed afterward to prevent air locks.
Is this a genuine Yanmar OEM part?
No, this is a high-quality aftermarket part manufactured to meet or exceed original equipment manufacturer (OEM) specifications. It provides an affordable and reliable alternative to the genuine Yanmar filter.
Does this filter include a new gasket?
Yes, the spin-on filter comes with an integrated gasket pre-installed. Before fitting, lightly lubricate the gasket with clean diesel fuel to ensure a proper seal.
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.
Payment & Security
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