Thermostat &  Thermostat Gasket for 9.9 15 HP Yamaha outboard Will fit :  2 Stroke: 9.9D 15D Replaces Yamaha Part Numbers :  Thermostat: 6F5-12411-00 / 6F5-12411-01 / 6F5-12411-02 / 6F5-12411-03 Gasket : 682-12414-A1 Marine grade quality aftermarket...