I have been working on my recently purchased " very used " Johnson 70 ? HP motor and have had a few electrical problems. While out on the water the engine died, no spark on any of the 3 cylinders, so I replaced the power pack CD3 ignition. It ran baaaaadly, misfired and sputtered. I know I hooked the unit up just like the last one.<br /> There is also wires on the engine that have 1, 2 or 4 wire connectors that do not connect to anything. Plus there are many splices in the other wires ( some change color ) going to the trim tilt relay connector box, power pack ( CD3 ) and voltage regulator. I think that a replacement of the large 8-pin connector (pigtail harness), trim tilt connector box and relays and the voltage regulator ( and possibly the stator ) should be in order. The problem is that I do not know the year of the engine, I have purchased both the Seloc 1973 - 1991 and Clymer 1991 - 1994 repair manuals but none of the wiring diagrams match mine.<br /> On the engine the date stamped core plug is missing but there is a "9" underlined in the bottom and the date plate has been removed.<br /> The only information I have is :<br /><br />Block # 340899<br />Cylinder Head # 339221<br />Intake Manifold # 336343-D3<br />It has "SV" Carburetors, a VRO oil/fuel pump but the oil tank and wiring has been removed.<br /><br /> Is it possible to find out the year and HP of the engine from these numbers and the parts numbers also ?
