18-3608D Thermostat for Yamaha Outboard
Running at the right temperature maximizes performance.
A failed or failing thermostat can cause an engine to run at outside of its optimum temperature and adversely affect performance and efficiency. Getting back to the right temperature can be as simple as replacing the thermostat. Sierra makes sourcing parts for the job easy by packaging the thermostat and gasket for an easy out the box installation. Each Sierra part is engineered to meet or exceed Yamaha specifications to assure boaters and technicians it will fit right the first time and restore function to OEM specifications.
Key Features
- Thermostat meets or exceeds manufacturer specifications
- Temperature rating of 122°F (50°C)
- Complete kit includes thermostat and gasket to eliminate time spent sourcing individual parts
How to find the thermostat kit you need
Select your thermostat kit by locating the OEM part number in the table below. If you don't know the OEM part number, please visit our Engine Parts Selector, where you can search by engine make, model, horsepower, serial number and year of manufacturer.
| Application` | OEM Part Number |
|---|---|
| Mallory | 9-43177 |
Model Compatibility Chart
| 115 hp Models | 130hp Models | 150hp Models | 175hp Models | 200hp Models | 225hp Models |
|---|---|---|---|---|---|
| 115 (1991-02), | 130 (1991-02), | 150 (1991-02), | 175 (1991-95, 97), | 200 (1991-98), | 225 (1991-97), |
| C115 (1991-99), | L130 (1991-00), | C150 (1996-99), | P175 (1994-99), | L200 (1991-99), | V225 (1998-99) |
| P115 (1993-96), | S130 (1996-99), | L150 (1991-99), | V175 (2000), | P200 (1991-99), | — |
| S115 (1996-99), | — | P150 (1991-99), | Z175 (2001-02), | S200 (1996-99), | — |
| — | — | S150 (1996-99), | — | V200 (1998-99), | — |
| — | — | V150 (2000-02), | — | Z200 (2001-02), | — |
| — | — | Z150 (2001-02), | — | — | — |
We offer a variety of Sierra engine parts for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Volvo and more…
