18-3675 Sierra Thermostat Gasket Mercury Manufacturer: Sierra Part Number: 18-3675 Cross References: SIE 3675, 18-3675, 1442-9401, 14429401, SIE18-3675 Condition: New Replaces: Mercury 27-8503181, 27-850318-1 Fits: Mercury 200-250HP 3.0L (DFI and EFI) (not every model or year) (verify fitment using your model or serial number)
