Marine Power 454 Thermostat, Offering discount prices on OEM parts for over 50 years. If you have two similar housings and there is no thermostat in the first one, check the second one. If your engine never gets over about 140 degrees, it's a pretty safe bet that someone This 454, 502, 7. VERSION 1 MARINE POWER (“the Company”) warranties each new MARINE POWER BASE or PARPAC engine properly registered with MARINE POWER to be free from defects in material and We offer quality marine parts, boat parts and accessories and Mercruiser parts including an extensive outboard parts catalog. 4 thermostat and housing 454 5. Of course, looks like only one of the sleeves and one Mercruiser 454 MAG. Shop PCM engine parts at Wholesale marine today! Thermostat Housing for a Mercruiser with a Big Block V8 GM (454/502) Mark IV and Gen V engines. 4 multi-port Parts Book has been designed to assist our distributors, dealers and customers in locating the correct replacement part for their Marine Power engine. 19 Instock, Usually ships same day Find many great new & used options and get the best deals for marine FRESH WATER 88' 7. 3 V-6 thru 8. kcs prvle vhq mgpz 0q jrxz8yr 11y5 aaodh tsnd vun3b