87290A4 Mercruiser Thermostat Housing Assembly

This is a used, like brand new thermostat housing. It is a genuine Mercury Marine part, not aftermarket. I am told it was bolted on and ran on a hose and then removed. It has never been to the lake or ocean. By the looks of it I can believe it, there is still paint on the springs for the nylon balls. This will fit many different models and years. It is the very common “design 1” found on 4.3, 5.0, and 5.7 liter engines. It is also found on some 454, 502, and 500 Bulldog engines.  Used in these applications  185/205 HP MR/ALPHA ONE ENGINE - 185 (2 BBL.) GM 262 V-6 1985-1987 5.7L COMPETITION SKI ENGINE - 5.7L COMPETITION SKI GM 350 V-8 1987-1995 898/200/228/230/260 HP R/MR/ALPHA ONE - 260 (4 BBL.) GM 305 V-8 1982-1986 540 STROKER 4V - 540 Stroker 4V HP 500 (502 CID) - 500 (GEN. V) GM 502 V-8 1996 175 HP/ 4.3L/205 HP/4.3L/LX - 4.3L (2 BBL.) GM 262 V-6 1988-1992 200/5.0L/LX 260/5.7L 350 MAG ALPHA/BRAVO - 5.0LX (4 BBL.) GM 305 V-8 1988-1995 450 HP (454 CID) 7.4L ENGINE - 450 (GEN.