Yamaha F225, F250, F300 4.2L V6 Outboard Maintenance Kit – Fits 4.2L V6 (2009-2020)
Yamaha F225, F250, F300 4.2L V6 Outboard Maintenance Kit – Fits 4.2L V6 (2009-2020) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Yamaha F225, F250, F300 4.2L V6 Outboard Maintenance Kit contains everything needed for a standard 100-hour service on compatible Yamaha 4.2L V6 outboard engines, including models F225C (2009–2015), F250A (2006–2013), and F300 (all years).
It serves as a direct replacement for Yamaha part numbers RECKITF225C, LUB-MRN42-KT-10, LUB-MRN42-KT-12, and LUB-MRN42-KT-15.
- Designed for the Yamaha-specified 100-hour service interval.
- Includes a 10-micron fuel/water separator filter for superior fuel system protection.
- Contains genuine Yamaha outboard parts and Yamalube marine engine oils for optimal performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | RECKITF225C |
| Yamaha | LUB-MRN42-KT-10 |
| Yamaha | LUB-MRN42-KT-12 |
| Yamaha | LUB-MRN42-KT-15 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for select Yamaha outboard models. Please verify your specific engine details against this list.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F225C | 225 | 4-Stroke | 2009–2015 | RECKITF225C | 3.3L V6 |
| Yamaha | F250A | 250 | 4-Stroke | 2006–2013 | RECKITF225C | 3.3L V6 |
| Yamaha | F300 | 300 | 4-Stroke | 2007–2009 | RECKITF225C | 4.2L V6 |
| Yamaha | F225 | 225 | 4-Stroke | 2010–2020 | LUB-MRN42-KT-10/12/15 | 4.2L V6 |
| Yamaha | F250 | 250 | 4-Stroke | 2010–2020 | LUB-MRN42-KT-10/12/15 | 4.2L V6 |
| Yamaha | F300 | 300 | 4-Stroke | 2010–2020 | LUB-MRN42-KT-10/12/15 | 4.2L V6 |
Technical Specs
- Product Type
- Outboard Maintenance Service Kit
- Installation
- Yamaha-directed 100-hour service
- Filtration Rating
- 10 Micron (Fuel/Water Separator)
- Fuel Type
- Gasoline
- Connection
- OEM-specified
- Dimensions
- 30.0" L x 30.0" W x 19.0" H
- Fitting Type
- OEM-specified
- Thread Size
- Various (Component-specific)
- Other Attributes
- Contains genuine Yamaha outboard parts and Yamalube marine engine oils
What’s in the Box
- 7 x Anode (CM15026A)
- 2 x Thermostat (67F-12411-01)
- 1 x Oil Filter (35-822626Q15)
- 4 x Anode (CM67F-11325-01A)
- 6 x Spark Plug (NGKLFR6A-11)
- 1 x Fuel Filter (6CB-24501-01)
- 1 x O-Ring (6CB-13016-00)
- 1 x Fuel Filter (63P-13915-00)
- 1 x VST O-Ring (6P2-14984-00)
- 1 x Fuel Filter (6P3-WS24A-00)
- 1 x O-Ring (6P3-24564-00)
- 1 x Washer (PAF15-04000003)
- 1 x Cotter Pin (91490-40030)
- 2 x Drain Gasket (90430-08020)
- 1 x Kit Anodes (CMY200250KITA)
- 1 x Water Pump Repair Kit (6P2-W0078-00)
*Note: Kit contents may vary slightly between model years and kit versions (LUB-MRN42-KT-10 vs LUB-MRN42-KT-12 vs LUB-MRN42-KT-15). Some kits include either 10W-30 or 20W-40 Yamalube engine oil.
Installation Notes
- Engine Oil: Warm up the engine, then turn it off. Remove the drain plug to drain the old oil. Replace the drain plug gasket and reinstall the plug. Refill with new Yamalube engine oil to the specified level.
- Oil Filter: Remove the old oil filter. Lightly lubricate the gasket on the new filter and install it by hand until snug, then tighten as per manufacturer specifications.
- Fuel Filters: Replace all inline and canister-style fuel filters, including the fuel/water separator. Ensure all connections are secure to prevent leaks.
- Spark Plugs: Remove and inspect the old spark plugs. Install new, correctly gapped plugs, tightening to the specified torque.
- Anodes: Inspect and replace all internal and external sacrificial anodes as needed to protect against corrosion.
- Thermostats & Water Pump: Replace the thermostats and the water pump impeller/kit to ensure proper engine cooling. Check housing for wear or damage.
- Lubrication: Lubricate all grease fittings (zerks) on the engine mount and steering components.
- Final Checks: After service, start the engine and check for any fuel, oil, or water leaks. Ensure the engine is operating smoothly.
Troubleshooting & FAQ
Will this kit fit my specific Yamaha V6 outboard?
This kit is designed for Yamaha F225, F250, and F300 4.2L V6 outboards from approximately 2010 to 2020, as well as earlier 3.3L models like the F225C and F250A. Always check the compatibility table with your exact model and year before purchasing.
How often should I use this maintenance kit?
This kit is designed for the standard 100-hour service interval as recommended by Yamaha. It should also be performed annually, whichever comes first, to ensure optimal engine health and reliability.
What's the difference between the LUB-MRN42-KT-10, KT-12, and KT-15 versions?
The primary difference is typically the type or quantity of Yamalube engine oil included. For example, one kit might contain 10W-30 oil while another contains 20W-40. The core service components (filters, plugs, anodes) are generally the same for the specified engines.
What signs indicate my outboard needs this service?
Besides reaching the 100-hour or one-year mark, signs include a drop in performance, difficulty starting, increased fuel consumption, or engine overheating. Proactive maintenance prevents these issues from becoming major failures.
Do I need special tools for this service?
Standard mechanic's tools, a torque wrench, an oil filter wrench, and a gear lube pump are typically required. Some tasks, like replacing the water pump, may require a flywheel puller depending on the engine model.
Are all parts in this kit direct replacements for Yamaha OEM parts?
Yes, the components included are specified as direct replacements for the Yamaha part numbers listed. They are designed to meet or exceed OEM specifications for fit and function.
Is this an OEM part?
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.
What are the shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty & return policy?
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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