Replacement:
This aftermarket thermostat replace Yamaha parts number:
688-12411-10-00
688-12411-11-00
6H3-12411-11-00
6E5-12411-30-00
6E5-12411-20-00
6E5-12411-10-00
6E5-12411-02
6E5-12411-00
6E5-12411
Application(fits Yamaha two stroke 3-220hp outboard models):
3A, 4A, 5C, 6C/D/J,8C/J, 8MSH-0405, 8MSH-0406, 8MSH-0407, 8MSH-0608, 8MSHD-2005,9.9B (Enduro), 9.9C,15B (Enduro),20D (up to 1993),25A (Enduro), 25B (Enduro), 25B (2001 on), 25J, 25N (up to 1993), 25V,C30 (93~)， 30H (Enduro), 30D/G/H,40X (Enduro), 40X,115A/ETN (up to 1985),140A (up to 1985),150A/ETN (up to 1985),175A (up to 1985),200A/ETN (up to 1985), 220A (up to 1985),250(1990-2004) .