Replaces Thermostat Gasket Part Number 18-3569 It's Aftermarket Thermostat Kit, Direct Replacement for Your Original One The Thermostat is 50C°/ 120℉ Replacement for various Mercury/Mariner 70-125 HP 2 cycle outboards Made of high quality for good durability & long working service PRODUCT DESCRIPTION: Mercury Mariner L3 L4 70 75 80 90 100 115 125 Thermostat Kit 803061T1 18-3569 The kit includes (1) 18-0182 Thermostat Gasket, (1) 18-0339 Thermostat Cover Gasket, and (1) 18-3549 Thermostat. It is interchangeable with GLM 13124, Mallory 9-43155, and Mercury Marine 803061T1.