Description
Suzuki 17670-91J02 Water Thermostat 50C DF2.5 DF4 DF5 DF6 DF9.9B DF15A DF20A
Help maintain proper cooling system performance with the Suzuki 17670-91J02 water thermostat. This genuine Suzuki 50°C / 122°F thermostat is used on select Suzuki small four-stroke outboards, including DF2.5, DF4/DF4A, DF5, DF6/DF6A, and fuel-injected DF9.9B, DF15A, and DF20A applications where this part number is specified.
Key Features
- Genuine Suzuki OEM water thermostat for select small outboard cooling systems
- 50°C / 122°F thermostat temperature rating
- Helps regulate cooling water flow to support proper engine operating temperature
- Fits select Suzuki DF2.5, DF4, DF4A, DF5, DF6, DF6A, DF9.9B, DF15A, and DF20A applications
- Correct for select fuel-injected “A/B” generation small outboards where specified
- Recommended to inspect during water pump service, cooling system service, and scheduled maintenance
- Supersedes earlier Suzuki thermostat part numbers 17670-91J00 and 17670-91J01 where specified
Fitment / Product Details
- Brand: Suzuki
- Part Number: 17670-91J02
- BU Part ID: Not provided
- Product Type: Water Thermostat / Cooling System Thermostat
- Application: Select Suzuki small four-stroke outboard cooling system applications where 17670-91J02 is specified
- Engine Types: Suzuki four-stroke outboards
- HP Range: Select DF2.5 through DF20A applications
- Serial Ranges: Not provided; verify by model, serial number, thermostat housing diagram, owner’s manual, or service manual
- Year Range: DF2.5 2006-2021+; DF4/DF4A 2002-2021+; DF5 2002-2016; DF6/DF6A 2002-2021+; DF9.9B 2013-2021+; DF15A 2013-2021+; DF20A 2013-2021+
- Temperature Rating: 50°C / 122°F
- UPC: Not provided
- Country of Origin: Not provided
- Prop 65: Not provided
- Package Dimensions: Not provided
- Package Weight: Not provided
- Supersedes / Replaces: 17670-91J00, 17670-91J01
- Fitment Note: Confirm compatibility by Suzuki part number, outboard model, model suffix, serial number, thermostat housing, cooling system diagram, owner’s manual, or service manual before ordering.
What’s Included
- One Suzuki 17670-91J02 50°C water thermostat
- Gaskets, seals, O-rings, and hardware are not included unless specifically stated by the seller
Expanded Fitment
- Suzuki DF2.5 — fits model years 2006-2021+ where 17670-91J02 is specified
- Suzuki DF4 / DF4A — fits model years 2002-2021+ where 17670-91J02 is specified
- Suzuki DF5 — fits model years 2002-2016, prior to DF5A introduction, where 17670-91J02 is specified
- Suzuki DF6 / DF6A — fits model years 2002-2021+ where 17670-91J02 is specified
- Suzuki DF9.9B — fits model years 2013-2021+ fuel-injected “B” suffix generation where specified
- Suzuki DF15A — fits model years 2013-2021+ fuel-injected generation where specified
- Suzuki DF20A — fits model years 2013-2021+ fuel-injected generation where specified
- Also cross-referenced by some parts sources to select Johnson/Evinrude applications using related part number 5033385
- Not universal; verify exact fitment by model, suffix, serial number, and parts diagram before ordering
Why You Should Buy
- OEM Suzuki thermostat for dependable fit when matched to the correct application
- Helps maintain correct operating temperature in compatible small Suzuki outboards
- Useful replacement during cooling system troubleshooting, water pump service, and preventive maintenance
- Helps address issues caused by a stuck, corroded, worn, or slow-opening thermostat
- Correct updated replacement when your parts diagram specifies 17670-91J02, 17670-91J01, or 17670-91J00
Common Applications
- Suzuki DF2.5 thermostat replacement
- Suzuki DF4, DF4A, DF5, DF6, and DF6A cooling system service
- Suzuki DF9.9B, DF15A, and DF20A fuel-injected outboard thermostat replacement
- Water pump service and cooling system inspection
- Overheating or overcooling diagnostic service where thermostat condition is checked
- Routine small Suzuki outboard preventive maintenance
FAQ
- What is Suzuki 17670-91J02? It is a genuine Suzuki water thermostat used in select small four-stroke outboard cooling systems.
- What temperature is this thermostat? This thermostat is rated at 50°C / 122°F.
- What models does it fit? It fits select DF2.5, DF4, DF4A, DF5, DF6, DF6A, DF9.9B, DF15A, and DF20A applications where this part number is specified.
- Does this fit DF9.9B, DF15A, and DF20A? Yes, it is listed for select 2013-2021+ fuel-injected DF9.9B, DF15A, and DF20A applications where specified.
- Does this fit DF5A? This listing covers DF5 2002-2016 prior to DF5A introduction. DF5A fitment should be checked separately by parts diagram before ordering.
- What part numbers does it replace? This thermostat supersedes or replaces 17670-91J00 and 17670-91J01 where specified.
- Is this the same as a 60°C thermostat? No. Suzuki 17670-91J02 is a 50°C thermostat. Do not substitute a 60°C thermostat unless your Suzuki service documentation specifies it.
- Does this include the gasket? This listing is for the thermostat only unless the seller specifically states that gaskets, seals, O-rings, or hardware are included.
- How do I confirm fitment? Confirm using Suzuki part number 17670-91J02, your outboard model, model suffix, serial number, thermostat housing diagram, owner’s manual, or service manual.