Yamaha Thermostat 2-stroke
| HP / Model | Year | Thermostat | Kit |
|---|---|---|---|
| 4 | 1986-88 | 18-3540 | |
| 4 | 1989-99 | 18-3623 | |
| 5 | 1995-02 | 18-3623 | |
| 6 | 1986-88 | 18-3540 | |
| 6 | 1989-00 | 18-3623 | |
| 8 | 1986-88 | 18-3540 | |
| 8 | 1989-09 | 18-3623 | |
| 9.9 | 1986-95 | 18-3625 | |
| 9.9 | 1996-09 | 18-3540 | |
| 15 | 1984-85 | ||
| 15 | 1986-95 | 18-3625 | |
| 15 | 1996-09 | 18-3540 | |
| 20 | 1996-97 | 18-3540 | 18-3609 |
| 25 (2 cyl) | 1984-87 | ||
| 25 (2 cyl) | 1988-09 | 18-3540 | 18-3609 |
| C25 | 1991-97 | 18-3625 | |
| CV25 | 1990 | 18-3625 | |
| 30 | 1984-85 | ||
| 30 | 1986 | 18-3625 | |
| 30 | 1987-88 | 18-3540 | 18-3609 |
| 30 | 1989-91 | 18-3623 | |
| 30 | 1992-02 | ||
| C30 | 1991-92 | 18-3625 | |
| C30 | 1993-94, 1996-97 | 18-3623 | |
| 40 | 1984-85 | ||
| 40 | 1986-05 | 18-3540 | 18-3609 |
| C40 | 1991-97 | 18-3625 | |
| C40 | 1998-03 | 18-3540 | 18-3609 |
| P40 | 1998 | 18-3540 | 18-3609 |
| 50 | 1984-85 | ||
| 50 | 1986-09 | 18-3540 | 18-3609 |
| C50 | 1998-01 | 18-3540 | 18-3609 |
| PRO 50 | 1987-90 | 18-3540 | 18-3609 |
| P50 | 1991-96 | 18-3540 | 18-3609 |
| 50 Jet | 1986-00 | 18-3540 | 18-3609 |
| C55 | 1991-95 | 18-3625 | |
| CV55 | 1989-90 | 18-3625 | |
| 60 | 2001-05 | Kit Only | 18-3622 |
| C60 | 1996-01 | Kit Only | 18-3622 |
| E60 | 1995-00 | Kit Only | 18-3622 |
| P60 | 1991-99 | Kit Only | 18-3622 |
| 70 | 1984-09 | Kit Only | 18-3622 |
| C70 | 2000-01 | Kit Only | 18-3622 |
| 115 | 1984-09 | 18-3540 | 18-3608 |
| B115 | 1998-99 | 18-3540 | 18-3608 |
| C115 | 1991-00 | 18-3540 | 18-3608 |
| P115 | 1993-96 | 18-3540 | 18-3608 |
| S115 | 1996-99 | 18-3540 | 18-3608 |
| 130 | 1988-04 | 18-3540 | 18-3608 |
| L130 | 1989-01 | 18-3540 | 18-3608 |
| S130 | 1996-99 | 18-3540 | 18-3608 |
| C150 | 1996-99 | 18-3540 | 18-3608 |
| 150 | 1984 | ||
| 150 | 1985 | 18-3623 | |
| 150 | 1986-09 | 18-3540 | 18-3608 |
| D150 | 1997-99 | 18-3540 | 18-3608 |
| DX150 | 1999-05 | 18-3540 | 18-3608 |
| L150 | 1986-99 | 18-3540 | 18-3608 |
| LX150 | 1999-01 | 18-3540 | 18-3608 |
| LZ150 | 2000-05 | 18-3540 | 18-3608 |
| Z150 | 2000-05 | 18-3540 | 18-3608 |
| P150 | 1991-99 | 18-3540 | 18-3608 |
| PX150 | 1999 | 18-3540 | 18-3608 |
| PRO V150 | 1986-90 | 18-3540 | 18-3608 |
| S150 | 1996-99 | 18-3540 | 18-3608 |
| SX150 | 1999-04 | 18-3540 | 18-3608 |
| V150 | 2000-08 | 18-3540 | 18-3608 |
| VX150 | 2000-04 | 18-3540 | 18-3608 |
| VZ150 | 2000-11 | 18-3540 | 18-3608 |
| 175 | 1985 | 18-3623 | |
| 175 | 1986-00 | 18-3540 | 18-3608 |
| P175 | 1994-99 | 18-3540 | 18-3608 |
| S175 | 1996-99 | 18-3540 | 18-3608 |
| V175 | 2000 | 18-3540 | 18-3608 |
| VZ175 | 2001-10 | 18-3540 | 18-3608 |
| Z175 | 2001-05 | 18-3540 | 18-3608 |
| 200 | 1985 | 18-3623 | |
| 200 | 1986-98 | 18-3540 | 18-3608 |
| L200 | 1986-99 | 18-3540 | 18-3608 |
| LX200 | 1999-01 | 18-3540 | 18-3608 |
| LZ200 | 2000-11 | 18-3540 | 18-3608 |
| P200 | 1991-99 | 18-3540 | 18-3608 |
| SX200 | 1999-05 | 18-3540 | 18-3608 |
| V200 | 1998-99 | 18-3540 | 18-3609 |
| VX200 | 2000-05 | 18-3540 | 18-3609 |
| VZ200 | 2001-04 | 18-3540 | 18-3608 |
| VZ200 | 2005-09 | 18-3525 | |
| Z200 | 2000-11 | 18-3540 | 18-3608 |
| V6 Special | 1985-86 | 18-3540 | 18-3608 |
| V6 Excel | 1987-89 | 18-3540 | 18-3608 |
| 225 | 1990-97 | 18-3540 | 18-3608 |
| L225 | 1994-99 | 18-3540 | 18-3609 |
| S225 | 1996-99 | 18-3540 | 18-3609 |
| LX225 | 2000-03 | 18-3540 | 18-3609 |
| SX225 | 2000-03 | 18-3540 | 18-3609 |
| V225 | 1998-99 | 18-3540 | 18-3609 |
| V225 | 2003-09 | 18-3525 | |
| VX225 | 2000-04 | 18-3540 | 18-3609 |
| VZ250 | 2003-09 | 18-3525 | |
| 250 | 1990-95 | 18-3540 | 18-3609 |
| L250 | 1990-99 | 18-3540 | 18-3609 |
| LX250 | 2000-03 | 18-3540 | 18-3609 |
| S250 | 1996-99 | 18-3540 | 18-3609 |
| SX250 | 2000-03 | 18-3540 | 18-3609 |
| VX250 | 2002-04 | 18-3540 | 18-3609 |
| Z250 / LZ250 | 2003-05 | 18-3525 | |
| VZ300 | 2004-09 | 18-3525 | |
| Z300 / LZ300 | 2004-06 | 18-3525 |