5034358 Water Pump Repair Kit for Johnson Evinrude | JLM Marine

5034358 Water Pump Repair Kit for Johnson Evinrude Outboard Motors

This comprehensive water pump repair kit is engineered for Johnson and Evinrude outboard motors ranging from 30 HP to 50 HP across multiple model years (2000–2007). It ensures reliable cooling system performance and includes essential maintenance components to keep your engine running smoothly.

This kit directly replaces OEM part number 5034358 and provides a complete maintenance solution with water pump components, thermostat, filters, and drain gaskets in one package.

• Complete service kit with water pump, thermostat, fuel filter, oil filter, and drain gaskets
• Designed for 2-stroke Johnson/Evinrude outboards 30–50 HP
• Includes gear oil pump for comprehensive maintenance

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 maintenance kit includes the following components:

• 5034358 Water Pump Repair Kit × 1
• 5031758 Thermostat × 1
• 5032323 Fuel Filter × 1 View Part →
• 5031411 Oil Filter × 1 View Part →
• 5030071 Drain Screw Gasket × 3
• 24OP149 Gear Oil Pump × 1

Installation Guide

1. Disconnect the spark plug wires and drain the lower unit gear oil completely. Remove the lower unit from the engine following your service manual.
2. Remove the old water pump housing and impeller assembly from the drive shaft. Inspect the drive shaft for wear or corrosion.
3. Clean all mating surfaces thoroughly to ensure a proper seal. Remove any old gasket material or debris.
4. Install the new impeller with marine-grade grease, ensuring the blades are oriented in the correct rotation direction. Align the impeller key with the drive shaft slot.
5. Place the new gaskets and O-rings from the kit in their proper positions. Do not reuse old seals.
6. Install the water pump housing and torque all fasteners to manufacturer specifications. Ensure proper alignment to avoid leaks.
7. Replace the thermostat (5031758) in the cylinder head, ensuring the temperature-sensing element faces the correct direction.
8. Install the new fuel filter (5032323) in the fuel line, observing the flow direction arrow. Secure all clamps tightly.
9. Replace the oil filter (5031411) and install new drain screw gaskets (5030071) on all three drain plugs.
10. Reattach the lower unit to the engine, torquing all mounting bolts per factory specifications. Refill the lower unit with fresh gear oil using the included gear oil pump (24OP149).
11. Reconnect spark plug wires and run the engine in a test tank or on-water. Verify strong water pump discharge from the tell-tale outlet.
12. Check for leaks around all seals, filters, and drain plugs. Retighten if necessary and confirm proper engine temperature operation.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific Johnson or Evinrude engine?
A: Cross-reference your engine's HP rating and year with the compatibility table above. Verify your OEM part number matches 5034358, or consult your service manual's parts diagram to confirm fitment before purchasing.

Q: How often should I replace the water pump and these maintenance components?
A: Water pump impellers should be replaced every 2–3 years or 200–300 hours of operation, whichever comes first. Filters and thermostats should be inspected annually and replaced as needed based on condition and manufacturer recommendations.

Q: What are the signs that my water pump or thermostat is failing?
A: Common symptoms include weak or no water discharge from the tell-tale, engine overheating, steam from the engine, or erratic temperature gauge readings. If you notice any of these signs, inspect and replace the water pump and thermostat immediately.

Q: Can I install this kit myself or do I need a marine technician?
A: If you have mechanical experience and the proper tools, you can install this kit following your service manual. However, professional installation is recommended to ensure proper torque specifications, seal alignment, and system testing.

Q: Does this kit include the water pump impeller or just the repair components?
A: This is a complete water pump repair kit (5034358) that includes the impeller, housing, gaskets, and seals. Additionally, the package includes a thermostat, fuel filter, oil filter, drain gaskets, and a gear oil pump for comprehensive maintenance.

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