Cooling System

Sierra Thermostat 18-3554, 143 Degree F, OMC Stern Drive Replacement, OE 383307

Sierra 18-3551 Marine Thermostat for 140 HP 6-Cylinder Engines, Replaces 1538930 1725960

Sierra Thermostat 130 Degree, Replaces 5001036, Fits Evinrude E200 E225 E250 & Johnson J200 J225 J250 Outboards

Sierra 18-3553 Brass Thermostat, 143 Degree F, Replaces Mercury 75692, Fits Mercury V135/V150

Sierra 18-3549 Thermostat, 120 Degree F, Replaces 803061T1, for Mercury 100/115/125 HP 4-Cylinder Outboards

Sierra Thermostat 18-3544, Replaces OEM 435491, for Evinrude and Johnson Outboards

Sierra Thermostat 18-3540, Replaces Yamaha 6E5-12411-30-00, Fits T60 and T9.9 Outboards

Sierra 18-3539 140 Degree Thermostat Kit for Closed Cooling Systems, Replaces 875779

Sierra 18-3536 Thermostat, 143 Degree F, Replaces Mercury Marine 833072

Sierra Thermostat 18-3525 for Yamaha 2-Stroke Outboards VZ200, V225, VZ250

Sierra 18-3535 Thermostat 130F, Replaces Mercury 885599004, Fits Mercury/Mariner 200/225/250 HP Outboards

Sierra Thermostat Housing 18-3531 for 7.4L 454 V-8 MIE Closed Cooling Engines, 1996-1997

Sierra 18-3517 Water Pump Kit for Mercruiser I/R/MR/Alpha Drives and Mercury/Mariner 65 HP-V6 Outboards

Sierra 18-3515 Water Pump Repair Kit, Replaces 6P2-W0078-00-00, for Yamaha F225/F250 Outboards

Sierra Circulating Pump 18-3506-1, Replaces 46-879194401, for MerCruiser V6 4.3L MCM SN 1A063240 and Newer

Sierra 18-3507 Water Pump Kit without Base - Replaces Mercury Marine 46-60366A1 for Mercury/Mariner Engines

Sierra 18-3500 Thermostat, 140 Degree F, Replaces 437090, Fits Evinrude E115/E135/E150/E175 Outboards

Sierra Water Pump Repair Kit without Housing 18-3494, Replaces 6CJ-W0078-00-00, Fits Yamaha F70A (2010-17)

Sierra 18-3475 Water Pump Repair Kit Without Housing for Yamaha T9.9 (2007-17), Replaces 69G-W0078-00

Sierra Water Pump Repair Kit with Housing 18-3473, Replaces 6EE-W0078-00-00, Fits Yamaha F4/F6 (2009-17)

Sierra 18-3466 Water Pump Kit with Housing, Replaces Yamaha 6H3-W0078-01

Sierra Water Pump Repair Kit 18-3470 for Yamaha F225A/F225B/F250A/F250B (4.2L) Outboards

Sierra 18-3450 Water Pump Kit without Housing, Yamaha Outboard, Replaces 63D-44322-00-00 / 68T-W0078-00-00