160 degree thermostat fits many different closed water cooled marine engines. 160 Degree Thermostat | Sierra 18-3649 Fits various Crusader fresh water cooled engine models including model 220, model 270, model 350, model 454 and model 502 Fits many Mercruiser fresh water cooled engine models including 3.0L 181 CID, 215 Ford 302 CID, 4.3L 262 CID, 5.0L GM 305 CID, 260 5.7L 350 CID, 7.4L 454 CID and 8.2L 502 CID Replaces Crusader 97895 Replaces Mercury 8M0109441 Replaces Marine Power 515422 Replaces Mallory 9-43002