Water Pump Repair Kit – Fits Johnson/Evinrude 20-35 HP (Replaces 393630, 0393630)

Water Pump Repair Kit – Fits Johnson/Evinrude 20-35 HP (Replaces 393630, 0393630)

This water pump repair kit is designed to fit Johnson/Evinrude 20-35 HP 2-stroke engines from 1980 and later models, ensuring compatibility with a broad range of outboards and commercial engines.

It serves as a direct replacement for Johnson/Evinrude parts 393630 and 0393630, as well as Sierra 18-3382, GLM 12070, and Mallory 9-48211.

• Includes essential pump components for repair
• Compatible with gasoline-fueled engines
• Engine mount installation

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 Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson Serial Number Guide.

Technical Specifications

Package Contents

• 1 x Neoprene Impeller (395289)
• 1 x Wear Plate (328755)
• 1 x Pump Housing (393632)
• 1 x Pump Cup (328751)
• 1 x Impeller Plate Gasket (325537)
• 1 x Grommet (302497)
• 1 x Impeller Key (330619/344470/777845)
• 1 x Rubber Seal (328753)
• 1 x Brass Bushing (328754)
• 1 x O-Ring for Brushing (301877)
• 1 x O-Ring (554545)
• 2 x O-Ring (311338)
• 6 x Stainless Steel Bolt with Washer (331979/324960/318452)

Installation Guide

1. Turn off the engine and disconnect the battery to ensure safety before beginning installation.
2. Remove the old water pump assembly from the engine mount carefully, preserving any seal surfaces.
3. Drain any residual coolant or water from the pump housing.
4. Disassemble the pump housing to remove the worn impeller and other components.
5. Compare all new parts with the old ones to ensure the correct kit components are included.
6. Install the new neoprene impeller into the pump housing, ensuring correct orientation.
7. Replace the wear plate, pump cup, grommet, seals, brass bushing, and gaskets as provided.
8. Secure all bolts with washers firmly, but avoid overtightening to prevent damage.
9. Reinstall the pump housing assembly onto the engine mount.
10. Reconnect the battery and start the engine; check for leaks and proper water flow.
11. Monitor the engine temperature to confirm proper pump function during initial operation.
12. Refer to your engine manual or the linked installation video if any step is unclear.

Troubleshooting & FAQ

• How do I confirm this fits my engine? Check your engine’s model, horsepower rating, and year against the compatible engine table above and consult the Johnson serial number guide linked.
• What are the differences compared to OEM parts? This listing is an aftermarket replacement built to OEM specifications using comparable materials, produced in an ISO9002-certified facility with consistent quality inspection.
• How often should I replace the water pump? Replacement depends on engine usage and water conditions; routinely inspect the impeller annually and replace if worn or damaged.
• What are common signs the water pump needs replacement? Overheating engine, reduced water flow, or visible damage to the impeller usually indicate it’s time for replacement.
• OEM vs. Aftermarket? 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.
• How fast do you ship and how much does it cost? 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.
• What is your warranty and return policy? 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.