Water Pump Repair Kit – Fits Mercury/Mariner 75-115 HP Outboards (Replaces 8M0113799, 43024A7)

Water Pump Repair Kit – Fits Mercury/Mariner 75-115 HP Outboards (Replaces 8M0113799, 43024A7)

This water pump repair kit is designed for a wide range of Mercury and Mariner outboards, including 2-stroke and 4-stroke models from 75 to 115 HP. Please refer to the compatibility tables below to verify fitment for your specific engine by serial number.

This assembly is a direct replacement for Mercury part numbers 46-8M0113799, 46-43024A7, 43024A4/43024A5/43024A6, and 43026T9, as well as Sierra part number 18-3688.

• Provides a direct-fit replacement for the specified engine models.
• Constructed with a neoprene impeller, non-asbestos gasket, and a stainless steel housing and wear plate.
• Includes one impeller, housing, wear plate, seals, and hardware for a comprehensive service.

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 Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Mercury/Mariner 2-Stroke Models

Mercury/Mariner 4-Stroke Models

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (Replaces 46-43024A7)
• 1 x Housing
• 1 x Wear Plate
• 1 x Pump Cover
• 1 x Drive Key
• 2 x Seals
• 4 x Screws

Installation Guide

1. Disconnect the Battery: Always begin by disconnecting the negative battery cable for safety.
2. Remove the Lower Unit: Unbolt and carefully lower the gearcase from the outboard's midsection. You may need to disconnect the shift linkage.
3. Access the Water Pump: With the lower unit removed, locate and unbolt the water pump housing.
4. Disassemble Old Pump: Remove the old housing, impeller, wear plate, gaskets, and seals. Note the orientation of the old impeller vanes.
5. Clean and Inspect: Thoroughly clean all mating surfaces, removing any old gasket material or debris.
6. Install New Components: Place the new gasket and wear plate onto the gearcase. Install the new drive key onto the driveshaft.
7. Install New Impeller: Slide the new impeller down the driveshaft. Turn the shaft clockwise while pushing down to correctly bend the vanes.
8. Install Housing: Apply a light coat of marine grease to the inside of the new housing and install it over the impeller.
9. Secure Housing: Align and install the new housing bolts. Tighten them to the manufacturer's recommended torque specifications in a crisscross pattern.
10. Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, water tube, and shift shaft align correctly. Secure the bolts.
11. Final Checks: Reconnect the battery. Start the engine using a water supply (flushing muffs) and verify a strong, steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Mercury engine?

A: The most reliable way to ensure compatibility is by checking your engine's serial number. Compare your serial number against the ranges provided in the "Compatible Engine Models" tables above. If you're still uncertain, feel free to contact our support team with your engine's model, year, and serial number for assistance.

Q: What are the common signs of a failing water pump?

A: A weak, intermittent, or completely absent stream of water from the "tell-tale" outlet is the most direct sign of a problem. You may also experience engine overheating, which can trigger an audible alarm or cause the engine to enter a power-reduction mode.

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

A: For preventative maintenance, it is generally recommended to replace your outboard's water pump impeller every 1 to 2 years, or every 100 to 200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater). Always consult your engine's service manual for the manufacturer's specific maintenance schedule.

Q: Is this an OEM part or an aftermarket part?

A: This listing is an aftermarket replacement part, not an OEM component. We build our parts to meet or exceed OEM specifications using comparable, high-quality materials. Production occurs in an ISO9002-certified facility, and each batch is inspected to ensure consistent quality and performance.

Q: How fast do you ship and what are the costs?

A: We offer fast global shipping, with most orders arriving within 5 to 15 days worldwide. Standard shipping is free. Depending on your location, expedited shipping options may be available at checkout for an additional fee.

Q: What is your warranty and return policy?

A: This product is covered by a 1-year warranty against manufacturing defects under normal operating conditions. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard return window for items that are unused and in their original condition. Please refer to our full policy page or contact us 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.