3RS-87500-0 Maintenance Kit for Tohatsu MFS9.9 MFS15 MFS20E | JLM Marine

3RS-87500-0 Maintenance Kit for Tohatsu MFS9.9 MFS15 MFS20E

This comprehensive maintenance kit is designed to fit Tohatsu MFS9.9, MFS15, and MFS20E outboard engines. It provides all essential service components needed for routine maintenance, ensuring your engine runs smoothly and reliably season after season.

This kit directly replaces OEM part number 3RS-87500-0, delivering an all-in-one solution for your scheduled service intervals.

• Includes water pump repair kit, thermostat, fuel filter, oil filter, and gear oil pump
• Complete maintenance solution in one convenient package
• Designed for easy installation during routine service

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.

Technical Specifications

Package Contents

This maintenance kit includes the following components:

• 3RS-87322-1 (Water Pump Repair Kit) × 1
• 3R3-01030-0 (Thermostat) × 1
• 346-01032-0 (Thermostat Gasket) × 1
• 369-02230-0 (Fuel Filter) × 1 View Part →
• 332-60006 (Drain Gasket) × 2
• 3BJ-07615-0 (Oil Filter) × 1 View Part →
• 24OP149 (Gear Oil Pump) × 1

Installation Guide

1. Preparation: Ensure the engine is off and cool. Gather necessary tools including wrenches, screwdrivers, and a drain pan.
2. Drain fluids: Remove the drain plug using the new drain gasket from the kit. Drain engine oil and lower unit gear oil completely into appropriate containers.
3. Replace oil filter: Unscrew the old oil filter (3BJ-07615-0) and install the new one from the kit. Hand-tighten, then turn an additional 3/4 turn.
4. Install fuel filter: Disconnect fuel lines and replace the old fuel filter with the new 369-02230-0 unit. Ensure connections are secure to prevent leaks.
5. Replace thermostat: Remove the thermostat housing cover and replace the old thermostat (3R3-01030-0) and gasket (346-01032-0) with new components from the kit.
6. Service water pump: Remove the lower unit and access the water pump. Replace all components using the water pump repair kit (3RS-87322-1) including impeller, gaskets, and seals.
7. Refill gear oil: Use the included gear oil pump (24OP149) to refill the lower unit with fresh gear oil. Fill until oil appears at the upper vent hole.
8. Refill engine oil: Add the manufacturer-recommended engine oil to the proper level. Check dipstick to confirm correct fill level.
9. Reassemble: Reinstall all components in reverse order. Torque all fasteners to manufacturer specifications.
10. Test run: Start the engine and check for leaks around all service points. Monitor engine temperature and ensure proper water flow from the cooling system.

Troubleshooting & FAQ

Q: How do I confirm this maintenance kit fits my Tohatsu engine?
A: This kit is designed specifically for Tohatsu MFS9.9, MFS15, and MFS20E models. Verify your engine model designation on the cowling or serial number plate to ensure compatibility before ordering.

Q: How often should I perform this maintenance service?
A: Tohatsu recommends complete maintenance service every 100 hours of operation or annually, whichever comes first. If you operate in saltwater or harsh conditions, consider servicing more frequently.

Q: Can I install this kit myself or do I need a professional?
A: While experienced DIY mechanics can perform this service, it requires disassembly of the lower unit and internal components. Professional installation is recommended if you're not comfortable with marine engine maintenance.

Q: What are signs that my engine needs this maintenance service?
A: Common indicators include overheating, weak water pump stream, rough idling, poor acceleration, or difficulty starting. Regular preventive maintenance with this kit helps avoid these issues.

Q: Does this kit include engine oil and gear oil?
A: No, this kit includes the gear oil pump for filling but not the fluids themselves. You'll need to purchase the appropriate engine oil and lower unit gear oil separately according to Tohatsu specifications.

Q: Is this an OEM or aftermarket maintenance 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.