432955 Water Pump Repair Kit for Johnson Evinrude | JLM Marine

Water Pump Repair Kit for Johnson Evinrude 70-75 HP (1974-1978) – OEM 432955

This comprehensive water pump repair kit is designed for Johnson and Evinrude outboard motors rated at 70-75 HP manufactured between 1974 and 1978. It provides all the essential components needed to restore your cooling system to optimal performance, including the water pump repair kit, thermostat, gaskets, and gear oil pump.

This kit directly replaces OEM part number 432955, offering a complete solution for maintaining your engine's cooling system during routine service or repair.

• Includes water pump repair kit, thermostat, multiple gaskets, and gear oil pump for complete cooling system service
• Fits Johnson and Evinrude 70-75 HP outboards from 1974-1978
• Complete kit eliminates the need to source individual components separately

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/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

This complete repair kit includes the following components:

• 438579 389143 (Water Pump Repair Kit) × 1
• 396987 (Thermostat) × 1
• 313416 (Gasket) × 1
• 332108 (Gasket) × 1
• 311598 (Drain Screw Gasket) × 2
• 24OP149 (Gear Oil Pump) × 1

Installation Guide

1. Disconnect the fuel line and remove the propeller for safety. Drain the lower unit gear oil completely.
2. Remove the lower unit from the engine by loosening the mounting bolts and disconnecting the shift linkage.
3. Unbolt and remove the old water pump housing from the lower unit. Inspect the driveshaft for wear or damage.
4. Remove the old impeller, plate, and gaskets from the pump housing. Clean all mating surfaces thoroughly to ensure a proper seal.
5. Install the new drain screw gaskets (311598) onto the drain screws as specified.
6. Lubricate the new impeller with glycerin or soapy water. Install it into the housing, ensuring the vanes are oriented correctly for rotation.
7. Install the new gaskets (313416 and 332108) in their proper locations on the pump housing and base plate.
8. Install the new thermostat (396987) into its designated location, ensuring proper seating and orientation.
9. Reassemble the water pump housing onto the lower unit, tightening all bolts to the manufacturer's specified torque.
10. Reconnect the lower unit to the engine, reattach the shift linkage, and torque all mounting bolts properly.
11. Refill the lower unit with fresh gear oil using the new gear oil pump (24OP149) provided in the kit.
12. Reinstall the propeller, reconnect the fuel line, and test the engine in water to verify proper cooling system operation.

Troubleshooting & FAQ

Q: How do I know if this kit fits my specific Johnson or Evinrude engine?
A: Cross-reference your engine's horsepower and year with the compatibility table above. This kit is designed for 70 HP (1974-1978) and 75 HP (1975-1978) models. If your engine falls within these specifications and uses OEM part number 432955, this kit will fit.

Q: How often should I replace my water pump and cooling system components?
A: Most manufacturers recommend replacing the water pump impeller and associated components every 2-3 years or 200-300 hours of operation, whichever comes first. If you notice overheating, weak water stream from the tell-tale, or visible impeller damage, replace immediately.

Q: What are the signs that my water pump needs replacement?
A: Common indicators include engine overheating, a weak or absent water stream from the tell-tale outlet, steam from the engine, or an audible high-temperature alarm. Inspect the impeller annually for cracked or missing vanes.

Q: Does this kit include everything I need for a complete cooling system service?
A: Yes, this comprehensive kit includes the water pump repair kit, thermostat, all necessary gaskets, drain screw gaskets, and a gear oil pump. You'll have all essential components for a thorough lower unit and cooling system service.

Q: Is this an OEM or aftermarket part?
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.