Water Pump Repair Kit – Fits Yamaha 115HP 130HP (Replaces 6N6-W0078-00, 6N6-W0078-01, 6N6-W0078-02)

$39.99 $63.00

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Water Pump Repair Kit – Fits Yamaha 115HP 130HP (Replaces 6N6-W0078-00, 6N6-W0078-01, 6N6-W0078-02) is backordered and will ship as soon as it is back in stock.

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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

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Water Pump Repair Kit – Fits Yamaha 115HP 130HP (Replaces 6N6-W0078-00, 6N6-W0078-01, 6N6-W0078-02) is designed for a wide range of Yamaha 2-stroke and 4-stroke outboard motors manufactured between 1993 and 2001. It includes models such as the F115, C115, P115, S115, L130, and S130 series, ensuring comprehensive fitment for routine lower unit maintenance.

It serves as a direct replacement for Yamaha OEM part numbers 6N6-W0078-00, 6N6-W0078-01, and 6N6-W0078-02, as well as Sierra aftermarket part 18-3312.

Installs in the outboard's lower unit.
Kit provides essential components for a standard water pump service.
Housing is not included; the original housing must be reused or purchased separately.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number	Notes
Yamaha	6N6-W0078-00	Original OEM number.
Yamaha	6N6-W0078-01	Superseded OEM number.
Yamaha	6N6-W0078-02	Current OEM number.
Sierra	18-3312	Direct aftermarket replacement.

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.
Yamaha	C115TLRU	115	2-Stroke	1994, 1996	6N6-W0078-00/01/02
Yamaha	C115TXRR	115	2-Stroke	1993	6N6-W0078-00/01/02
Yamaha	P115TLRS	115	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	P115TLRT	115	2-Stroke		6N6-W0078-00/01/02
Yamaha	P115TLRU	115	2-Stroke	1996	6N6-W0078-00/01/02
Yamaha	P115TLRR	115	2-Stroke		6N6-W0078-00/01/02
Yamaha	115TJRS	115	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	115TJRT	115	2-Stroke	1995	6N6-W0078-00/01/02
Yamaha	115TJRU	115	2-Stroke		6N6-W0078-00/01/02
Yamaha	115TJRR	115	2-Stroke		6N6-W0078-00/01/02
Yamaha	115TLRS	115	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	115TLRT	115	2-Stroke		6N6-W0078-00/01/02
Yamaha	115TLRU	115	2-Stroke	1996	6N6-W0078-00/01/02
Yamaha	115TXRS	115	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	F115	115	4-Stroke	2000–2001	6N6-W0078-00/01/02
Yamaha	L130TXRS	130	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	130TLRR	130	2-Stroke		6N6-W0078-00/01/02
Yamaha	130TLRS	130	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	130TLRT	130	2-Stroke		6N6-W0078-00/01/02
Yamaha	130TXRR	130	2-Stroke		6N6-W0078-00/01/02
Yamaha	130TXRS	130	2-Stroke	1994	6N6-W0078-00/01/02
Yamaha	130TXRT	130	2-Stroke		6N6-W0078-00/01/02
Yamaha	F130	130	4-Stroke		6N6-W0078-00/01/02

Technical Specs

Product Type: Water Pump Repair Kit
Installation: Outboard
Dimensions: 11.5" H x 16.0" W x 12.0" L
Other Technical Attributes: Requires removal of lower unit for installation

What’s in the Box

1 x Gasket, Water Pump (6E5-44315-A0-00)
4 x Bolt (97095-08045-00)
1 x Impeller (6E5-44352-01-00)
1 x Key, Impeller (90280-04M05-00)
1 x Cup, Insert (61A-44322-00-00)
1 x Plate, Wear (6E5-44323-00-00)
1 x O-Ring (6G8) (93210-37M67-00)
1 x O-Ring (93210-86M38-00)
2 x Pin, Dowel (93606-12019-00)
4 x Washer, Bolt (90209-08M02-00)

Installation Notes

Disconnect the engine's battery and shift the outboard into neutral.
Place a drain pan under the lower unit and remove the gear lube drain screw to drain the oil.
Unbolt and carefully lower the gearcase assembly from the engine.
Remove the water pump housing bolts and lift the housing to access the old components.
Remove the old impeller, wear plate, gaskets, and seals. Note their orientation.
Thoroughly clean all mating surfaces, removing any old gasket material or corrosion.
Install the new components from the kit in the reverse order of removal. Lightly grease the new impeller.
Re-install the water pump housing, ensuring all components are aligned, and tighten bolts to spec.
Re-mount the lower unit, ensuring the driveshaft and shift shaft are correctly seated.
Refill the lower unit with fresh gear lube and reinstall the drain screw with a new gasket.
Reconnect the battery and test the engine with a water supply to confirm proper pump operation.

Troubleshooting & FAQ

How do I know if my water pump is failing?

Common signs include a weak or no water stream from the "telltale" outlet, engine overheating alarms, and in severe cases, steam from the exhaust. Visually inspect the telltale stream every time you start your engine.

How often should the water pump impeller be replaced?

For preventative maintenance, it's recommended to replace the impeller and gaskets every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter in saltwater or high-debris environments.

Does this kit include the water pump housing?

No, this is a repair kit that does not include the plastic or metal housing. It is designed for servicing a functional, un-damaged housing by replacing the internal wear items. If your housing is cracked, warped, or heavily corroded, it must be purchased separately.

Is sealant needed for the gaskets?

Generally, sealant is not required for the main water pump gaskets. Ensure all surfaces are clean and dry before reassembly. Applying a thin coat of marine grease to the O-rings can help them seat properly.

What is the difference between the -00, -01, and -02 part numbers?

These numbers represent different versions or supersessions of the same Yamaha kit. A higher number (e.g., -02) is a newer revision, but all are interchangeable and contain the necessary components for the listed models.

Why are some years missing for my engine model?

While this kit fits a broad range, some specific year data was unavailable during documentation. If your model and horsepower match the list but the year is not specified, verify fitment by matching your existing OEM part number to one of the cross-references provided.

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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