5000308 Maintenance Kit for Evinrude 40HP 50HP 55HP 60HP 65HP | JLM Marine

Maintenance Kit for Evinrude 40HP 50HP 55HP 60HP 65HP | OEM 5000308

This comprehensive maintenance kit is designed for Evinrude outboard engines ranging from 40HP to 65HP, covering model years 2004–2020. Engineered to deliver reliable performance, this kit provides all the essential components needed for routine maintenance and service intervals.

This kit directly replaces OEM part number 5000308, ensuring seamless compatibility with your Evinrude outboard. It includes critical components such as the water pump impeller, thermostat, fuel filter, anode, and gear oil pump—everything required to keep your engine running smoothly.

• Complete maintenance solution with 11 components for comprehensive engine service
• Includes water pump components, thermostat, fuel filter, anode, and gear oil pump
• Fits multiple horsepower ratings across a 16-year production span

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 maintenance kit includes the following components:

• 396725 / 396723 Impeller × 1
• 334897 Impeller Key × 2
• 336530 Gasket × 1
• 324981 Seal × 1
• 319275 Wear Plate × 1
• 340619 Insert Cup × 1
• 5005440 Thermostat × 1
• 5005266 Fuel Filter × 1 View Part →
• 436745 Anode × 1
• 311598 Drain Screw Gasket × 2
• 24OP149 Gear Oil Pump × 1

Note: Verify all part numbers against your engine's service manual before installation to ensure complete compatibility.

Installation Guide

1. Preparation: Disconnect the fuel line and ensure the engine is off and cool. Gather necessary tools including screwdrivers, wrenches, and a drain pan.
2. Water Pump Service: Remove the lower unit by loosening mounting bolts. Extract the old water pump housing and impeller assembly.
3. Install Impeller Components: Insert the new impeller key into the driveshaft slot, then slide the new impeller onto the shaft with blades oriented correctly. Apply marine grease to the impeller blades to ease installation.
4. Install Gaskets and Seals: Place the new gasket and wear plate into position on the pump housing. Install the seal and insert cup according to your service manual specifications.
5. Reassemble Water Pump: Carefully reinstall the lower unit, ensuring all components align properly. Torque mounting bolts to manufacturer specifications.
6. Replace Thermostat: Locate the thermostat housing on the cylinder head and remove the cover. Install the new thermostat with the spring side facing down, then reinstall the cover with a new gasket.
7. Replace Fuel Filter: Disconnect fuel lines from the old filter and replace with the new fuel filter. Ensure connections are secure and check for leaks before starting the engine.
8. Install Anode: Remove the old sacrificial anode from the lower unit and replace with the new anode. Tighten securely but do not overtighten.
9. Change Gear Oil: Remove the drain and vent screws and allow old gear oil to drain completely. Use the included gear oil pump to refill through the lower drain hole until oil appears at the upper vent hole.
10. Install Drain Screw Gaskets: Place new drain screw gaskets on both drain and vent screws before reinstalling them. Tighten to proper torque specifications.
11. Final Inspection: Double-check all connections, bolts, and fittings for proper tightness. Reconnect the fuel line and run the engine in water to verify proper water flow and operation.
12. Test Run: Monitor engine temperature and check for leaks during the first few minutes of operation. Verify strong water flow from the telltale port.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my specific Evinrude engine?
A: Cross-reference your engine's horsepower rating and year with the compatibility table above. Verify the OEM part number 5000308 matches your engine's service manual specifications.

Q: How often should I replace the components in this maintenance kit?
A: Most manufacturers recommend replacing the water pump impeller annually or every 100 operating hours, whichever comes first. The thermostat, fuel filter, and anode should be inspected during each service interval and replaced as needed or per your engine's maintenance schedule.

Q: What are the signs that my water pump impeller needs replacement?
A: Common symptoms include reduced water flow from the telltale port, engine overheating, weak or intermittent water stream, or visible cracks and missing blades on the impeller during inspection. If you notice any of these signs, replace the impeller immediately.

Q: Can I install this kit myself or do I need a professional?
A: If you have mechanical experience and the proper tools, you can perform this maintenance yourself by following the installation guide and your engine's service manual. However, professional installation is recommended to ensure all components are correctly installed and torqued to specifications.

Q: Does this kit include gear oil or just the oil pump?
A: This kit includes the gear oil pump tool only; gear oil must be purchased separately. Consult your engine's service manual for the correct oil type and capacity.

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.