5033541 Maintenance Kit for Johnson Evinrude 90HP 115HP | JLM Marine

5033541 Maintenance Kit for Johnson Evinrude 90HP 115HP | JLM Marine

This comprehensive maintenance kit is engineered for Johnson/Evinrude outboard engines rated at 90HP and 115HP (2003–2006). It bundles essential service components—water pump repair kit, thermostat, fuel filter, oil filter, drain screw gaskets, and gear oil pump—into one convenient package for streamlined seasonal or annual maintenance.

Designed as a direct replacement for OEM number 5033541, this kit ensures compatibility with factory specifications while offering reliable aftermarket quality. It simplifies routine servicing by providing all critical wear items in a single purchase.

• Includes six key components covering water circulation, fuel delivery, lubrication, and gear oil service
• Covers multiple service intervals: impeller, thermostat, filters, and drain gaskets
• Fits both 90HP and 115HP models from 2003 to 2006 model years

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:

• 5033541 Water Pump Repair Kit × 1
• 5033721 Thermostat × 1
• 5032323 Fuel Filter × 1
• 5033539 Oil Filter × 1
• 5030071 Drain Screw Gasket × 3
• 24OP149 Gear Oil Pump × 1

Installation Guide

1. Prepare the engine: Disconnect the battery, tilt the outboard into service position, and allow it to cool completely.
2. Remove the lower unit: Drain the gear oil using the upper and lower drain plugs, then unbolt and separate the lower unit from the midsection.
3. Replace the water pump: Remove the pump housing, discard the old impeller and housing components, then install the new water pump repair kit per the impeller's directional markings.
4. Install the thermostat: Locate the thermostat housing on the cylinder head, remove the old thermostat, and seat the new one with fresh gaskets or O-rings as required.
5. Replace the fuel filter: Locate the in-line or canister fuel filter, release fuel pressure, disconnect fuel lines, and swap in the new filter with correct flow direction.
6. Replace the oil filter: Remove the old oil filter, lightly oil the new gasket, hand-tighten the new filter onto the mounting base, then torque to specification.
7. Install drain screw gaskets: Replace the three drain screw gaskets at the lower unit drain plugs to ensure leak-free sealing when refilling gear oil.
8. Refill gear oil: Use the included gear oil pump to inject fresh gear oil through the lower drain hole until it flows from the upper vent; install plugs with new gaskets.
9. Reassemble the lower unit: Align the drive shaft and water tube, then bolt the lower unit back onto the midsection, torquing fasteners to factory specifications.
10. Test and bleed the cooling system: Reconnect the battery, use a flush attachment or test tank, and run the engine to verify water flow from the tell-tale and check for leaks.
11. Check fluid levels: Inspect engine oil and gear oil levels, top off as needed, and verify no leaks around the new filters or drain plugs.
12. Final inspection: Confirm all fasteners are secure, hoses are clamped, and no tools remain in the engine bay before returning to service.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?
A: Cross-reference your engine's model year and horsepower with the compatibility table above. For 90HP or 115HP Johnson/Evinrude outboards built between 2003 and 2006, this kit is a direct fit.

Q: How often should I perform this maintenance?
A: Most manufacturers recommend replacing the water pump impeller annually or every 100–300 operating hours, whichever comes first. Fuel and oil filters should be changed at least once per season.

Q: Can I install this kit myself or do I need professional help?
A: If you have mechanical experience and the proper tools, you can complete the installation following your service manual. However, professional installation is recommended if you are unfamiliar with lower unit removal or water pump servicing.

Q: What are the signs that my water pump or filters need replacement?
A: Key symptoms include weak or absent water flow from the tell-tale, engine overheating, reduced performance, rough idling, or difficulty starting.

Q: Is this an OEM product or aftermarket?
A: This listing is an aftermarket replacement part built to OEM specifications using comparable-grade materials in an ISO9002-certified facility.

Important Notes

• Verify that the product images and specifications match your original part before purchasing.
• 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.