Thermostats & Housings

Sierra 18-1977-1 Thermostat Housing for Mercruiser 305 cid V-8 (1977-1982), Replaces 4765100, 6218461

Sierra Retainer Gasket 18-1221-9, 2-Pack, Fits Johnson/Evinrude 200 HP and 225 HP (1988-93)

Sierra 18-1222 Thermostat Diaphragm Gasket, Johnson/Evinrude V4/V6 200/225 HP 1988-93, Replaces OMC 394408

Sierra Thermostat Gasket 18-1202, Replaces 332369, V-4 Engines, Pack of 2

Sierra Thermostat Gasket 18-0878-9, Replaces RM0003, Pack of 2

Sierra Thermostat Gasket 18-0323 for Mercury Outboard Engines

Sierra Thermostat Housing Gasket 18-0164-9, Replaces Yamaha YSC-13080-00-0C, Pack of 2

Sierra 18-3606 Thermostat Kit 130F for Mercury/Mariner V-135 DFI, V-150 DFI, V-175 DFI Outboards

Sierra Thermostat Kit 18-3651, 142 Degree, for GM 327/350 V-8 and Ford Stern Drive Engines

Sierra 18-3618 Raw Water Cooled Thermostat Kit, 150 Degree, Volvo Penta I/O Cooling System

Sierra 18-3569 Marine Thermostat Kit, 120 F, for Mercury/Mariner 70-125 HP 2 Cycle Outboards 1987 and Newer

Sierra 18-2917-9 Thermostat Housing Gasket - Pack of 2 for MerCruiser MCM/MIE GM V-6 & V-8 Engines

Sierra 18-3622 Thermostat Kit for Yamaha Outboards, Replaces 6H3-12411-11-00, 122F

Sierra 18-3555 Thermostat, 160 Degree, for Mercruiser 7.4L MIE 454 V-8 Closed Cooling 1996-1997

Sierra Thermostat 18-3643 for Johnson/Evinrude 6 HP and 8 HP 1990 Outboards

Sierra 18-3668 Thermostat Kit for MerCruiser 5.0LX and 898 305 cid V-8 Engines

Sierra 18-0182-9 Thermostat Gasket, Pack of 2 - Fits Johnson/Evinrude 200-235 HP Outboards

Sierra Thermostat Gasket 18-0835 - Replaces Yamaha 62Y-12414-00-00 for Yamaha 2-Stroke Outboards

Sierra Thermostat Kit 18-3621 for Volvo Penta Marine Engine Cooling Systems

Sierra Thermostat Kit 18-3642 for Mercury Outboard Engines

Sierra 18-3646 Thermostat Kit, 140F, Replaces GM 4765100, Fits 228/305 V-8 1977-1982

Sierra 18-3541 Thermostat, 140F/60C, Yamaha Outboard, Replaces 66M-12411-01-00

Sierra Raw Water Thermostat 18-3615, 150 Degree F, White, Volvo Penta Applications