Thermostat (60°C) – Fits Suzuki Outboard DF8A, DF9.9, DF15, DF20, DF25, DF30A (Replaces 17670-94J00, 17670-94J01, 17670-94J02)

Thermostat (60°C) – Fits Suzuki Outboard DF8A, DF9.9, DF15, DF20, DF25, DF30A

This is an aftermarket replacement thermostat for Suzuki Outboard 4-stroke engines from 8 HP to 30 HP, covering 2005–2012 models including the DF8A, DF9.9, DF15, DF20, DF25, and DF30A series.

It is a direct replacement for Suzuki OEM part numbers 17670-94J00, 17670-94J01, and 17670-94J02, as well as other equivalent parts from Johnson/Evinrude/OMC and Recmar.

• Engineered for a 60°C (140°F) operating temperature.
• Designed as a direct OEM-spec replacement for straightforward installation.
• Includes one thermostat assembly per package.

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 Suzuki owners, You can review exploded diagrams here to verify part numbers: Suzuki Parts Diagrams & Catalog.

Technical Specifications

Package Contents

This package includes:

• 1 x Thermostat Assembly (Replaces OEM 17670-94J02)

Installation Guide

1. Safety First: Before starting, ensure the engine is off and cool. Disconnect the negative battery cable.
2. Drain Coolant: Place a container under the engine and carefully drain the coolant to a level below the thermostat housing.
3. Locate Housing: Identify the thermostat housing on the engine block; it's typically where the main coolant hose connects.
4. Remove Housing: Loosen and remove the bolts securing the housing cover. Gently tap it if it's stuck, but do not pry.
5. Extract Old Thermostat: Note the orientation of the old thermostat and remove it. Also, remove the old gasket or O-ring.
6. Clean Surfaces: Thoroughly clean the mating surfaces of the housing and engine block to ensure a perfect seal.
7. Install New Thermostat: Place the new thermostat into the housing in the correct orientation. Install the new gasket.
8. Reassemble: Re-attach the housing cover and tighten the bolts to the manufacturer's specified torque. Do not overtighten.
9. Refill & Check: Refill the cooling system with the appropriate coolant. Reconnect the battery, start the engine, and check for any leaks around the housing as the engine warms up.

Troubleshooting & FAQ

How do I confirm this thermostat fits my Suzuki engine?
First, check the "Compatible Engine Models" table above. Locate your engine's model, horsepower, stroke type, and year range. Second, cross-reference your current thermostat's part number with the numbers in our "Part Number Cross-Reference" table. If both match, the part is compatible.

What are the signs of a faulty thermostat?
Common symptoms include the engine overheating, the temperature gauge reading unusually high or low, erratic temperature fluctuations, slow engine warm-up, and black smoke from the exhaust.

How often should I replace my outboard engine's thermostat?
It is good practice to inspect your thermostat annually, especially if operating in saltwater. We recommend replacing it every 2-3 years as part of preventative maintenance, or immediately if you notice any signs of failure.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.