Quicksilver Thermostat MCM 864493 by Quicksilver Marine $24.25 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Quicksilver Thermostat MCM #710-864493 170 MCM 4.3L, 5.0L, 5.7L & 6.2L MPI engines with dry joint exhaust and closed cooling