Thermostat 17670-94J00 for Suzuki DF8A DF9.9 DF15 DF20R DF25A DF30A Outboard
Thermostat 17670-94J00 for Suzuki DF8A DF9.9 DF15 DF20R DF25A DF30A Outboard
Product Overview
Thermostat for the Suzuki DF8 to DF30 outboards, supplied as 1 x thermostat rated at 60 degrees. This is the part that holds the engine at its running temperature by opening the cooling water flow once it is warm. It replaces Suzuki 17670-94J02, 17670-94J01 and 17670-94J00, and it covers the small Suzuki four stroke range from the DF8A through to the DF30A.
The rating is what matters. This one opens at 60 degrees, which is a low rating and is normal on these small Suzuki engines. Fitting a higher rated thermostat to an engine built for this one changes the running temperature rather than fixing it.
It fails in one of two ways. Stuck shut, and the engine overheats within a few minutes of starting. Stuck open, and the engine never reaches temperature, runs cold, makes oil, and uses more fuel than it should.
The listings write the rating as 60° with no unit. Suzuki rates these thermostats in Celsius, so 60 degrees is 60 C, which is 140 F.
These engines are matched by model and year rather than by serial number, because Suzuki changed the housing by model year across this range. The model and year table below is the one to check against the engine.
Specifications & Attributes
| Specification | Detail |
|---|---|
| Condition | New / New with tags |
| Type | Thermostat |
| Opening Temperature | 60 C, 140 F |
| Suzuki Part Numbers | 17670-94J02, 17670-94J01, 17670-94J00 |
| Fits | Suzuki DF8 to DF30 outboards |
| Models | 9 models in 4 groups, see the table below |
| Engine Type | Suzuki Marine four stroke outboard |
| Parts In Kit | 1 piece |
| Quantity | 1 thermostat |
| Net Weight | 72 g including packaging |
| Packaging | Pack |
| Warranty | 3 year |
OEM Cross Reference
| Component | Numbers |
|---|---|
| Thermostat | 17670-94J00, 17670-94J01, 17670-94J02 |
| Supersession | The three numbers are listed together, the listings do not say which supersedes which |
Compatible Engines
| Model | Years |
|---|---|
| DF8A | 2010 and up |
| DF9.9A (AR) | 2010 and up |
| DF9.9 (R) | 2004 to 2012 |
| DF15 (R) | 2004 to 2012 |
| DF20R | 2006 to 2013 |
| DF25R, DF25Q | 2006 to 2013 |
| V2 | 2006 to 2013 |
| DF25A | 2015 and up |
| DF30A | 2015 and up |
These are the model and year groups given on the listing for this thermostat. The AR and R codes after DF9.9A and DF15 are the model suffixes Suzuki uses for the different builds of those engines, and both are covered by this thermostat.
V2 is listed with the DF20R and DF25R in the 2006 to 2013 group. It is written as a model code on the listing rather than as a displacement, so if your engine plate says V2 rather than a DF number, it is the 2006 to 2013 group.
The Australian listing writes DF20R as DF2OR, with the letter O in place of the zero. It is the same engine. If your engine is not in the table, send us the model and the serial number and we will check the thermostat against it before you order.
What's Included
| Component | Detail | Qty |
|---|---|---|
| Thermostat | 60 C, replaces 17670-94J00 and the other numbers listed | 1 |
| Gasket | Not included | 0 |
| O-ring | Not included | 0 |
| Housing | Not included | 0 |
This listing is for the thermostat on its own. The gasket and the O-ring that seal the housing are separate parts and are not in the pack, so if the housing has not been apart before, order them at the same time.
Key Features
| Feature | Detail |
|---|---|
| Direct replacement | Fits in place of Suzuki 17670-94J00 and the other numbers listed |
| 60 C rating | 140 F, the low rating used on these small Suzuki engines |
| Small four stroke | DF8A through DF30A |
| Two model groups | The 2004 to 2012 and 2015 and up builds are both covered |
| Model V2 | Covers the V2 code listed with the 2006 to 2013 engines |
| Matched by model | 9 models in 4 groups listed above |
Signs The Thermostat Has Failed
| What You See | What It Means | Action |
|---|---|---|
| Overheat within minutes of starting | Thermostat stuck shut | Fit a new thermostat |
| Engine never reaches running temperature | Thermostat stuck open | Fit a new thermostat |
| Temperature swings up and down | Thermostat opening late and closing early | Fit a new thermostat |
| Overheat at speed, fine at idle | Thermostat not opening fully | Fit a new thermostat |
| Overheat after a lay up | Thermostat seized from corrosion over the winter | Fit a new thermostat before the season |
| Temperature gauge flat low all day | Thermostat open, engine running cold | Fit a new thermostat |
Fitting Notes
| Step | Action |
|---|---|
| 1 | Check the outboard model and year against the table above |
| 2 | Drain the cooling system down below the thermostat housing |
| 3 | Take the housing off and note which way round the old thermostat sits |
| 4 | Clean the housing faces and check them for pitting |
| 5 | Fit the new thermostat the right way round, with the spring towards the engine |
| 6 | Fit a new gasket or O-ring if the old one is hard or flat |
| 7 | Refill and run the engine up to temperature, then check the gauge holds steady |
| 8 | Check the tell tale has a strong stream once the engine is warm |
Condition & Warranty
| Item | Detail |
|---|---|
| Condition | New / New with tags |
| Warranty | 3 year |
| Packaging | Pack |
Before You Buy
- 60 C thermostat for Suzuki outboards
- Replaces Suzuki 17670-94J00, 17670-94J01 and 17670-94J02
- Fits the DF8A and DF9.9A (AR) from 2010
- Fits the DF9.9 (R) and DF15 (R) from 2004 to 2012
- Fits the DF20R, DF25R, DF25Q and V2 from 2006 to 2013
- Fits the DF25A and DF30A from 2015
- 60 C is 140 F
- Thermostat only, the gasket and O-ring are separate parts
- 72 g with packaging
- 30-Day Easy Returns
- Free Worldwide Shipping
Verfügbarkeit für Abholungen konnte nicht geladen werden
Boat Owners' Review
Before You Buy
Frequently Asked Questions
What is your refund policy?
We offer a 14-day hassle-free return on all products. Items must be unused and in original packaging. Every XRmarine part is also covered by our 1-year warranty against manufacturing defects. If something is not right, email us at info@xrmarineparts.com — replacement or full refund, your choice.
See our full Refund Policy for complete details.
How does shipping work?
Free international shipping on every order — no minimums. We operate a global warehouse network with a main distribution centre in Asia (10-20 business days). We also hold stock in regional warehouses across the United States, Germany, the United Kingdom, Australia, and Poland (opening soon) — most orders arrive in 1-3 business days within those countries and in 2-8 business days to nearby regions. Tracking included.
See our full Shipping Policy.
How do you keep prices fair?
We cut out the middlemen. XRmarine sources directly from quality manufacturers and sells at honest prices. Same OEM-quality parts, no dealership markup. Every order comes with free shipping, real expert support, and a 1-year warranty.
Learn more on our About Us page.
What payment methods do you accept?
We currently accept PayPal — a fast, secure way to pay online. Credit card payments (Visa, Mastercard, American Express) and Shopify Payments are being set up and will be available soon. We appreciate your patience.