Water Pump Repair Kit – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 6BG-W0078-00-00, 6BG-W0078-01-00)
Water Pump Repair Kit – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 6BG-W0078-00-00, 6BG-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Repair Kit – Fits Yamaha F30/F40 4-Stroke Outboards (Rep...
Water Pump Repair Kit – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 6BG-W0078-00-00, 6BG-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Repair Kit – Fits Yamaha F30/F40 4-Stroke Outboards (Replaces 6BG-W0078-00-00) provides everything needed for a full service. It is designed for Yamaha F30 (2013–2022) and F40 (2009–2022) 4-Stroke engines, ensuring reliable performance and cooling.
This kit is a direct aftermarket replacement for Yamaha OEM part numbers 6BG-W0078-00-00 and its superseded version, 6BG-W0078-01-00.
- Direct OEM-spec replacement for a perfect fit.
- Includes a new impeller, housing, gaskets, and all necessary hardware.
- Engineered for durability in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Yamaha | 6BG-W0078-00-00 | 6BG-W0078-01-00 | |
| Yamaha | 6BG-W0078-01-00 | Supersedes 6BG-W0078-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits the following Yamaha outboard models:
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F30LA | 30 | 4-Stroke | 2013–2020 | 6BG-W0078-00-00 | |
| Yamaha | F30LEHA | 30 | 4-Stroke | 2013–2020 | 6BG-W0078-00-00 | |
| Yamaha | F40JEA | 40 | 4-Stroke | 2009–2020 | 6BG-W0078-00-00 | |
| Yamaha | F40JEHA | 40 | 4-Stroke | 2009–2020 | 6BG-W0078-00-00 | |
| Yamaha | F40LA | 40 | 4-Stroke | 2008–2020 | 6BG-W0078-00-00 | |
| Yamaha | F40LEHA | 40 | 4-Stroke | 2008–2020 | 6BG-W0078-00-00 | |
| Yamaha | F40SA | 40 | 4-Stroke | 2018–2020 | 6BG-W0078-00-00 | |
| Yamaha | F30 | 30 | 4-Stroke | 2009–2016 | 6BG-W0078-00-00 | Models 6BT1 to 6BT9 |
| Yamaha | F40 | 40 | 4-Stroke | 2009–2016 | 6BG-W0078-00-00 | Models 6BG1 to 6BG9 |
| Yamaha | E40X, 40X | 40 | 2-Stroke | 6BG-W0078-00-00 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct OEM replacement
What’s in the Box
- 1 x Pump Housing Cover (63D-44312-00-00)
- 1 x Water Pump Gasket (63D-44316-00-00)
- 1 x Insert Cartridge (63D-44322-00-00)
- 1 x Cartridge Outer Plate (63D-44323-00-00)
- 1 x Water Seal Damper 2 (663-44366-00-00)
- 1 x Impeller (6H4-44352-02-00)
- 4 x Bolt, With Washer (90119-08M15-00)
- 1 x Woodruff Key (90280-03M03-00)
- 1 x O-Ring (93210-59MG7-00)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Drain the lower unit gear lubricant.
- Remove the bolts securing the lower unit to the engine.
- Carefully lower and detach the lower unit.
- Unbolt and remove the old water pump housing and components.
- Clean the mounting surfaces thoroughly.
- Install the new water pump components in the reverse order of removal, ensuring proper alignment of the new impeller and key.
- Apply a light coat of marine grease to the new gaskets and O-rings before assembly.
- Re-install the lower unit, ensuring the driveshaft and water tube align correctly.
- Refill the gear case with the manufacturer-specified lubricant.
- Reconnect the battery and test the engine in a water source to confirm proper water flow.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
This kit is specifically for Yamaha F30 (2013–2022) and F40 (2009–2022) 4-stroke outboards. Please verify your exact model and year against the compatibility chart on this page. Do not purchase if your model is not listed.
What are the signs of a failing water pump?
Common signs include a weak or inconsistent water stream from the "tell-tale" outlet, engine overheating alarms, and a dry-rotted or damaged impeller upon inspection.
How often should the water pump be serviced?
For preventative maintenance, it's recommended to inspect the impeller annually and replace the entire water pump kit every 2–3 years or 200–300 hours of use, whichever comes first, especially for boats used in saltwater.
Is the included impeller made of the same material as the original?
Yes, the impeller is made from a durable, high-performance rubber compound designed to meet or exceed OEM specifications for longevity and chemical resistance in marine environments.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
