Thermostat – Fits Honda BF 75-225 HP Outboard Motors (Replaces 19300-ZY3-023, 19300-ZY6-003)

Thermostat – Fits Honda BF 75-225 HP Outboard Motors

This thermostat is designed for Honda Marine 75-225 HP, 4-Stroke outboard motors from 2002–present. It ensures your engine maintains the correct operating temperature for optimal performance and fuel efficiency. Compatible models include the BF75, BF80, BF90, BF100, BF115, BF130, BF135, BF150, BF175, BF200, and BF225 series.

This is a direct replacement for Honda part numbers 19300-ZY3-023 and 19300-ZY6-003, ensuring a precise fit and reliable function.

• Installation Method: Direct Replacement
• Operating Temperature: 60°C (140°F)
• Package Includes: 1 Thermostat, 2 Seals

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

• 1 x Thermostat (Replaces 19300-ZY3-023)
• 2 x Thermostat Seals

Installation Guide

1. Safety First: Before starting, disconnect the battery and ensure the engine is cool.
2. Drain Coolant: Place a container under the engine and drain the cooling system.
3. Locate Housing: Find the thermostat housing on the engine block.
4. Remove Housing: Unscrew the bolts holding the thermostat cover in place. Note the orientation of the parts.
5. Remove Old Thermostat: Carefully take out the old thermostat and its seal or gasket.
6. Clean Surfaces: Thoroughly clean the thermostat housing and cover surfaces to ensure a proper seal.
7. Install New Thermostat: Place the new thermostat and seal/gasket in the housing, ensuring it is correctly oriented.
8. Reassemble: Re-attach the housing cover and tighten the bolts to the manufacturer's recommended torque.
9. Refill Coolant: Refill the cooling system with the appropriate coolant.
10. Test for Leaks: Reconnect the battery, start the engine, and check for any leaks around the housing as the engine warms up.

Troubleshooting & FAQ

Q: How do I confirm this thermostat fits my engine?

A: The most reliable method is to match your engine's model and year to our Compatible Engine Models table. You can also verify by cross-referencing your existing part number with our list of direct replacements.

Q: I see two different temperatures listed (50°C and 60°C). Which one is correct?

A: Our specification is 60°C (140°F), which is the standard operating temperature for the listed Honda models. Some third-party sellers reference 50°C, but our parts are manufactured to the primary OEM standard for optimal performance.

Q: What are the common signs of a failing thermostat?

A: A faulty thermostat can cause engine overheating (if stuck closed) or prevent the engine from reaching its proper operating temperature (if stuck open). This can lead to poor performance, increased fuel consumption, and engine alarms.

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.