Description
Suzuki 17670-98L00 Water Thermostat 55C DF300 DF350 Outboard
Help maintain proper engine operating temperature with the Suzuki 17670-98L00 water thermostat. This genuine Suzuki 55°C thermostat is designed for select Suzuki outboard cooling system applications, commonly including DF300 and DF350 models where this part number is specified.
Key Features
- Genuine Suzuki OEM water thermostat for select outboard cooling systems
- 55°C thermostat temperature rating
- Helps regulate cooling water flow to support proper engine operating temperature
- Commonly referenced for select Suzuki DF300 and DF350 outboard applications
- Important maintenance part for cooling system performance and engine protection
- Recommended to inspect during water pump service, cooling system service, and scheduled maintenance
- Best matched by Suzuki part number, engine model, serial number, and parts diagram
Fitment / Product Details
- Brand: Suzuki
- Part Number: 17670-98L00
- BU Part ID: Not provided
- Product Type: Water Thermostat / Cooling System Thermostat
- Application: Select Suzuki outboard cooling system applications where 17670-98L00 is specified
- Engine Types: Suzuki four-stroke outboards where this 55°C water thermostat is listed by parts diagram
- HP Range: Commonly referenced for select DF300 and DF350 applications; verify exact fitment before ordering
- Serial Ranges: Not provided; verify by outboard model, serial number, parts diagram, owner’s manual, or service manual
- Year Range: Commonly referenced for DF350 applications including 2018; verify by model year, serial number, and parts diagram
- Temperature Rating: 55°C - 131°
- Fitment Note: Confirm compatibility by Suzuki part number, outboard model, serial number, thermostat housing, cooling system diagram, owner’s manual, or service manual before ordering.
What’s Included
- One Suzuki 17670-98L00 55°C water thermostat
- Gaskets, seals, O-rings, and hardware are not included unless specifically stated by the seller
Expanded Fitment
- Select Suzuki DF300 outboard cooling system applications where specified
- Select Suzuki DF350 outboard cooling system applications where specified
- Applications requiring Suzuki 17670-98L00 thermostat replacement
- Cooling system service locations where a 55°C water thermostat is required
- Not universal; verify by model, serial number, and parts diagram before ordering
Why You Should Buy
- OEM Suzuki thermostat for reliable fit when matched to the correct application
- Helps maintain proper engine temperature during operation
- Useful replacement during cooling system troubleshooting, water pump service, and preventive maintenance
- Helps address symptoms related to a stuck, corroded, worn, or slow-opening thermostat
- Correct replacement when your parts diagram specifies Suzuki 17670-98L00
Common Applications
- Suzuki DF300 thermostat replacement
- Suzuki DF350 thermostat replacement
- Outboard cooling system inspection and service
- Water pump replacement maintenance
- Overheating or overcooling diagnostic service where thermostat condition is checked
- Routine Suzuki outboard preventive maintenance
FAQ
- What is Suzuki 17670-98L00? It is a genuine Suzuki water thermostat used in select Suzuki outboard cooling system applications.
- What temperature is this thermostat? This thermostat is rated at 55°C.
- Does this fit Suzuki DF300 or DF350? It is commonly referenced for select DF300 and DF350 applications, but fitment must be confirmed by exact model, serial number, and parts diagram.
- Is this the same as the 60°C thermostat? No. Suzuki 17670-98L00 is listed as a 55°C thermostat. Do not substitute it for a 60°C thermostat unless your service manual or parts diagram allows it.
- Should I inspect this during water pump service? Yes. Thermostats are commonly inspected during water pump and cooling system maintenance and replaced as needed.
- Does this include the gasket? This listing is for the thermostat only unless the seller specifically states that gaskets, seals, or hardware are included.
- How do I confirm fitment? Confirm using Suzuki part number 17670-98L00, your outboard model, serial number, thermostat housing diagram, owner’s manual, or service manual.



