394711 Service Kit for Johnson Evinrude 9.9HP 10HP 15HP | JLM Marine

394711 Service Kit for Johnson Evinrude 9.9HP 10HP 15HP

This comprehensive service kit is designed for Johnson and Evinrude outboard engines rated at 9.9HP, 10HP, and 15HP, covering model years 1974–2007. It provides essential maintenance components to keep your engine running reliably season after season.

This kit directly replaces OEM part number 394711 and includes all critical service items for routine maintenance intervals.

• Complete service package with water pump repair kit, fuel filter, thermostat, drain screw gaskets, and gear oil pump
• Covers over three decades of Johnson/Evinrude 9.9–15HP models (1974–2007)
• Simplifies maintenance by bundling all essential service components in one kit

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 service kit includes the following components:

• 394711 Water Pump Repair Kit × 1
• 5032238 Fuel Filter × 1 View Part →
• 394411 Thermostat × 1
• 311598 Drain Screw Gasket × 2
• 24OP149 Gear Oil Pump × 1

Installation Guide

1. Preparation: Gather necessary tools (screwdrivers, wrenches, socket set) and place the engine in a stable, accessible position. Disconnect the fuel line and remove the engine cowling.
2. Water Pump Service: Remove the lower unit by loosening the mounting bolts. Disassemble the water pump housing and replace all components from the water pump repair kit (impeller, gaskets, seals, and wear plate).
3. Thermostat Replacement: Locate the thermostat housing on the cylinder head and remove the cover bolts. Replace the old thermostat with the new 394411 unit, ensuring proper orientation, and install a new gasket.
4. Fuel Filter Installation: Locate the inline fuel filter in the fuel line. Disconnect the fuel lines and replace the old filter with the new 5032238 fuel filter, ensuring proper flow direction.
5. Drain Screw Gaskets: When draining and refilling gear oil, replace both drain screw gaskets (311598) to prevent leaks. Tighten drain screws to manufacturer specifications.
6. Gear Oil Service: Use the included 24OP149 gear oil pump to refill the lower unit with fresh gear oil. Fill through the lower drain hole until oil appears at the upper vent hole, then install both plugs with new gaskets.
7. Reassembly: Reinstall the lower unit, ensuring proper alignment of the driveshaft and water tube. Torque all mounting bolts to specifications.
8. Final Checks: Reconnect the fuel line and reinstall the cowling. Start the engine in a test tank or on the water and verify proper water flow from the cooling system telltale.

Troubleshooting & FAQ

Q: How do I confirm this service kit fits my specific Johnson or Evinrude engine?
A: Verify that your engine is a 9.9HP, 10HP, or 15HP Johnson/Evinrude model manufactured between 1974 and 2007. Cross-reference your existing part number 394711 or consult your engine's service manual to confirm compatibility.

Q: How often should I perform this service on my outboard?
A: Most manufacturers recommend servicing the water pump, thermostat, and fuel system annually or every 100 hours of operation, whichever comes first. Gear oil should be changed at least once per season or if contamination is suspected.

Q: What are the signs that my water pump or thermostat needs replacement?
A: Common symptoms include reduced water flow from the telltale, engine overheating, steam from the engine compartment, or inconsistent operating temperature. If you notice any of these issues, inspect and replace water pump and thermostat components immediately.

Q: Can I install this kit myself, or do I need a marine mechanic?
A: If you have mechanical experience and the proper tools, you can perform this service yourself by following the installation guide and your engine's service manual. However, professional installation is recommended if you're unfamiliar with outboard maintenance procedures.

Q: What's the difference between this aftermarket kit and the OEM Johnson/Evinrude kit?
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.