Water Pump Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6E5-W0078-A1-00)

Water Pump Repair Kit – Fits Yamaha 115/130 HP 2-Stroke (Replaces 6E5-W0078-A1-00)

This water pump repair kit provides the necessary components to service the water pump on Yamaha 2-Stroke 115–130 HP outboards manufactured between 1984 and 1992, including C115 and 130 models.

It serves as a direct replacement for Yamaha part number 6E5-W0078-A1-00 and Sierra part number 18-3434.

• Complete Kit: Includes all essential gaskets, o-rings, and the impeller for a full replacement.
• Direct Fitment: Engineered as a direct replacement part, ensuring proper fit and function.
• Important: Water pump housing is not included with this kit and must be purchased separately if needed.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Water Pump Gasket (6E5-44315-A0-00)
• 1 x Cartridge Insert (6E5-44322-00-00)
• 1 x Cartridge Outer Plate (6E5-44323-00-00)
• 1 x Impeller (6E5-44352-01-00)
• 4 x Washers (90209-08M02-00)
• 1 x Woodruff Key (90280-04M05-00)
• 1 x O-Ring (93210-37M67-00)
• 1 x O-Ring (93210-86M38-00)
• 2 x Dowel Pins (93606-12019-00)
• 4 x Bolts (97080-08045-00)
• Note: Housing (6E5-44311-00-00) is NOT included and must be purchased separately.

Installation Guide

1. Safety First: Disconnect the engine's battery before starting work.
2. Access the Pump: Remove the lower unit (gearcase) from the outboard's midsection.
3. Disassemble: Carefully unbolt and remove the old water pump housing. Note the orientation of the old impeller vanes.
4. Remove Old Parts: Take out the old impeller, gaskets, wear plate, and key.
5. Clean Surfaces: Thoroughly clean all mating surfaces, removing any old gasket material or corrosion.
6. Install New Components: Place the new gasket, outer plate, and cartridge insert into position.
7. Install Impeller: Slide the Woodruff key onto the driveshaft and then install the new impeller, turning the shaft clockwise to bed the vanes correctly.
8. Lubricate: Apply a light coat of marine grease to the inside of the new housing and impeller.
9. Reassemble: Reinstall the water pump housing and tighten the bolts to the manufacturer's specified torque.
10. Reattach Lower Unit: Reinstall the lower unit onto the outboard.
11. Test: Reconnect the battery. Start the engine using a water supply (flushing muffs or in water) and confirm a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?

A: This kit is specifically for Yamaha 115-130 HP 2-Stroke outboards from 1984-1992. Please review the "Compatible Engine Models" table to verify your specific model and year. We also recommend using the Yamaha Serial Number Guide to identify your engine with certainty.

Q: Does this kit include the water pump housing?

A: No, the water pump housing (part # 6E5-44311-00-00) is not included in this kit. It must be purchased separately if your existing housing is cracked, warped, or excessively worn.

Q: What are the signs my water pump impeller is failing?

A: The most common sign is a weak, inconsistent, or non-existent water stream from the "tell-tale" cooling outlet. Other indicators include engine overheating alarms, steam from the exhaust, or finding broken vanes on the old impeller during inspection.

Q: How often should I replace the water pump kit?

A: For preventative maintenance, we recommend replacing the water pump impeller and gaskets every 1 to 2 years, or every 100-200 hours of use. This interval can be shorter if you frequently operate in sandy, silty, or saltwater conditions.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.