YAMAHA 4-STROKE THERMOSTAT
| THERMOSTAT PART NUMBER | THERMOSTAT KIT PART NUMBER | HP MODEL | YEAR | GASKET | QTY. PER ENGINE |
| Kit Only | S18-3624 | F2.5 | 2003-17 | S18-0754 | 1 |
| S18-3541 | - | F4 | 1999-17 | S18-0754 | 1 |
| S18-3541 | - | F6 | 2001-08 | S18-99120 | 1 |
| S18-3541 | - | F6 | 2009-17 | S18-0754 | 1 |
| S18-3541 | - | F8 | 2001-10 | S18-99120 | 1 |
| S18-3541 | - | F8A | 2011-14 | S18-99120 | 1 |
| S18-3541 | - | F8B | 2015-18 | S18-99120 | 1 |
| S18-3541 | - | T8 | 2001-10 | S18-99120 | 1 |
| S18-3541 | - | F9.9 | 1985-05 | S18-99120 | 1 |
| S18-3541 | S18-3611 | F9.9(66N) | 2005-06 | S18-0835 | 1 |
| S18-3541 | - | F9.9A | 2011-12 | S18-99120 | 1 |
| S18-3541 | - | F9.9B | 2013-18 | S18-99120 | 1 |
| S18-3541 | - | F9.9F | 2007-10 | S18-99120 | 1 |
| S18-3541 | - | FT9.9 | 1985-90 | S18-99120 | 1 |
| S18-3541 | - | T9.9 | 1991-05 | S18-99120 | 1 |
| S18-3541 | S18-3611 | T9.9(66R) | 2005-06 | S18-0835 | 1 |
| S18-3541 | - | T9.9A | 2011-12 | S18-99120 | 1 |
| S18-3541 | - | T9.9B | 2013-18 | S18-99120 | 1 |
| S18-3541 | - | T9.9G | 2007-10 | S18-99120 | 1 |
| S18-3541 | S18-3611 | F15 | 1998-06 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F25 | 1998-05 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F25A | 2009-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F25B | 2012-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F25 | 1998-08 | S18-0835 | 1 |
| S18-3541 | S18-3611 | T25 | 2001-04 | S18-0835 | 1 |
| S18-3541 | S18-3611 | T25 | 2001-08 | S18-0835 | 1 |
| S18-3541 | S18-3611 | T25 | 2009-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F30 | 2001-05 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F30 | 2013-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F40 | 1999-06 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F40A | 2008-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F40B | 2007-08 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F50 | 1995-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | T50 | 1996-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F60 | 2002-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | T60 | 2003-18 | S18-0835 | 1 |
| S18-3541 | S18-3611 | F70A | 2010-18 | S18-0835 | 1 |
| S18-3632 | - | F75A | 2003017 | - | 1 |
| S18-3641 | - | F75B | 2017-18 | - | 1 |
| S18-3541 | - | F80 | 1999-00 | - | 1 |
| S18-3632 | - | F80 | 2001-03 | - | 1 |
| S18-3632 | - | F90 | 2003-11 | - | 1 |
| S18-3632 | - | F90A | 2012-17 | - | 1 |
| S18-3641 | - | F90B | 2016-18 | - | 1 |
| S18-3641 | - | VF90A | 2018 | - | 1 |
| S18-3541 | - | F100 | 1999-00 | - | 1 |
| S18-3632 | - | F100 | 2001-03 | - | 1 |
| S18-3525 | - | F115/LF115 | 2000-14 | - | 1 |
| S18-3639 | - | F115/LF115 | 2014-18 | - | 1 |
| S18-3639 | - | VF115 | 2015-18 | - | 1 |
| S18-3632 | - | F150/ LF150 | 2004-11 | S18-99127 | 1 |
| S18-3632 | - | F150A/ LF150A | 2012-14 | S18-99127 | 1 |
| S18-3632 | - | F150B/ LF150B | 2015-18 | S18-99127 | 1 |
| S18-3636 | - | F150C/ LF150C | 2017 | - | 1 |
| S18-3636 | - | VF150 | 2013-17 | - | 1 |
| S18-3636 | - | VF150A | 2018 | - | 1 |
| S18-3636 | - | F175A | 2014-18 | - | 1 |
| S18-3636 | - | F175C/ LF175C | 2017 | - | 1 |
| S18-3636 | - | VF175 | 2015-18 | - | 1 |
| S18-3632 | - | F200/ LF200 | 2005-10 | - | 2 |
| S18-3632 | - | F200A/ LF200A | 2011-17 | - | 2 |
| S18-3636 | - | F200B/ LF200B | 2012-18 | - | 1 |
| S18-3636 | - | F200C/ LF200C | 2013-18 | - | 1 |
| S18-3632 | - | VF200 | 2009-10 | - | 2 |
| S18-3637 | - | VF200LA | 2011-18 | - | 2 |
| S18-3632 | - | F225/ LF225 | 2005-10 | - | 2 |
| S18-3632 | - | F225A/ LF225A | 2011-17 | - | 2 |
| S18-3524 | - | F225A/ LF225A | 2010-17 | - | 2 |
| S18-3524 | - | F225B/ LF225B | 2016-17 | - | 2 |
| S18-3632 | - | F225B/ LF225B | 2008-09 | - | 2 |
| S18-3632 | - | VF225 | 2009-10 | - | 2 |
| S18-3637 | - | VF225LA | 2011-18 | - | 2 |
| S18-3632 | - | F250/ LF250 | 2005-11 | - | 2 |
| S18-3524 | - | F250A/ LF250A | 2010-17 | - | 2 |
| S18-3524 | - | F250B/ LF250B | 2016-17 | - | 2 |
| S18-3632 | - | VF250 | 2010 | - | 2 |
| S18-3637 | - | VF250LA | 2011-18 | - | 2 |
| S18-3524 | - | VF250XA | 2015-17 | - | 2 |
| S18-3634 | - | F300/ LF300 | 2007-09 | - | 2 |
| S18-3524 | - | F300A/ LF300A | 2010-18 | - | 2 |
| S18-3634 | - | F350L LF350 | 2007-09 | - | 2 |
| S18-3634 | - | F350A/ LF350A | 2010-11 | - | 2 |
| S18-3634 | - | F350B/ LF350B | 2012-15 | - | 2 |
| S18-3634 | - | F350C/ LF350C | 2016-18 | - | 2 |