120 Degree Thermostat | Sierra 18-3549 Prop Shaft Hardware If you hit a rock

If you hit a rock or log

Installs on the vacuum side of the fuel transfer pump

With its strong history of innovation and quality

Blue Sea Black Dimmer Control Switch 8291

Optimal protection with quality materials

120 Degree Thermostat | Sierra 18-3549 Prop Shaft Hardware If you hit a rock120 Degree Thermostat Sierra 18 3549 Aftermarket thermostat used on many different Mercury and Mariner outboard motors. Fits Mercury 6 HP, 8 HP, and 9. 9 HP 2 cylinder outboard engines from serial number A197112 and later Fits Mercury and Mariner Sea Pro 10 outboard engines from serial number D038000 and later Fits Mercury and Mariner 18XD, 20XD, and 25XD outboard engines from serial number B114231 and later Fits Mercury and Mariner 25 Sea Pro 2