We ended up with a Sea Ray SRV 170, 4 cyl Mercruiser I/O for part of our labor on a roofing job. We haven't been able to find out the year it was built. According to Sea Ray website, pre 1972 did not have hull # on stern. Boat serial # is 6171784, Stern drive serial # is 2001810. Also, we suspect fuel pump diaphragm may be leaking, as there was lots of old gas in the engine oil. New oil, filter, plugs, wire, etc. Won't pump fuel from can, very little at carb. Are kits available to rebuild fuel pump ? Runs at idle, if spraying gas into carb, sounds good. Lots if questions, but want to go fishin' before it gets too cold ! Any info would be SWEET. Thanks, raceri69........