Water Tube Guide – Fits Yamaha F115 Outboard Motors (Replaces 6EK-44379-00-00)
Water Tube Guide – Fits Yamaha F115 Outboard Motors (Replaces 6EK-44379-00-00) is backordered and will ship as soon as it is back in stock.
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Water Tube Guide – Fits Yamaha F115 Outboard Motors (Replaces 6EK-44379-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Tube Guide is designed for Yamaha F115 four-stroke outboard engines manufactured from 2006 through the current model year. It ensures the proper alignment and protection of the water tube within the lower unit, a critical component of the engine's cooling system.
It serves as a direct replacement for Yamaha OEM part number 6EK-44379-00-00.
- Installs in the lower unit (gearcase) assembly.
- Connects to the engine's raw water cooling system.
- Guides and protects the water tube from damage and misalignment.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 6EK-44379-00-00 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
Compatibility for Yamaha outboard motors:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F115 | 115 | 4-Stroke | 2006–2024 | 6EK-44379-00-00 | |
| Yamaha | F115LA | 115 | 4-Stroke | 2014 | 6EK-44379-00-00 | |
| Yamaha | F115LB | 115 | 4-Stroke | 2024 | 6EK-44379-00-00 |
Technical Specs
- Product Type
- Water Tube Guide
- Installation
- Lower Unit / Gearcase
- Connection
- Water System
- Other Technical Attributes
- Part of the water cooling system that guides and protects the water tube in the lower unit
What’s in the Box
- 1 x Guide, Water Tube (6EK-44379-00-00)
Installation Notes
- Disconnect the engine's battery and shift the outboard into neutral.
- Drain the gearcase oil into a suitable container.
- Remove the bolts securing the lower unit (gearcase) and carefully separate it from the upper casing.
- Locate the old water tube guide at the top of the water pump housing and remove it.
- Clean the area of any debris or corrosion.
- Press the new water tube guide firmly into place, ensuring it is properly seated.
- Reinstall the lower unit, making sure the water tube, driveshaft, and shift shaft are correctly aligned.
- Secure the lower unit with the mounting bolts, tightening to the manufacturer's specified torque.
- Refill the gearcase with fresh marine gear lubricant.
- Reconnect the battery, start the engine in water, and verify that the cooling system is functioning correctly by observing the tell-tale stream.
Troubleshooting & FAQ
How do I confirm this guide fits my specific Yamaha F115 model?
Check the compatibility table on this page. It lists specific models and year ranges (F115, F115LA, F115LB from 2006–2024). Always verify the OEM part number 6EK-44379-00-00 against your engine's parts diagram for a definitive match.
What are the signs of a worn or failed water tube guide?
A damaged or missing guide can lead to poor water tube alignment, causing reduced water flow to the powerhead. Symptoms include engine overheating at idle or low speeds, a weak or intermittent tell-tale stream, and potential damage to the water pump impeller.
When should the water tube guide be replaced?
It is best practice to inspect and, if necessary, replace this guide during routine water pump or impeller service, which is typically recommended every 100 hours or at least once per year. Replace it immediately if it appears cracked, brittle, or deformed.
What is the difference between this part and the OEM version?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency to ensure reliable performance.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most locations; expedited options and exact costs are displayed at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- Professional installation is recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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