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Exhaust Housing Assembly: 381280
Upper End Cap is stamped 1161-7815
Exhaust Cover Screw: 331001
From a AQ131A 4-Cylinder Sterndrive (B230 Block) Basically this is a mostly complete set of bolts from the teardown of an AQ131A
14:27 Ratio
Mercury Mariner 76575A2 76221 Fuel Pump Assembly Filter Base 700 70hp 3cyl 77-83 Blowers & Vents Exhaust Housing Assembly: 381280Part Number(s) Included 76575A2 Fuel Pump Assembly Similar to 76575A9 but the fittings are arranged differently 76221 Fuel Filter Base (No Cover) General Application Compatibility Mercury & Mariner 70hp 3cyl Outboards SN 4571652 6428680 (1977 1983ish) Other Details Freshwater Used Parts The diaphragm might be fine but you can build these rather cheaply with the Sierra 18 7809 Fuel Pump Kit Purchase with confidence!