engine cosmetics in very good condition.purchased in 2006 and owner hardly used. was in bubble wrap and styrofoam when purchased.motor ran great until this spring, when it started to get harder to start and when running would not kick up into high gear almost like it was running at half power.changed spark plugs and tested coil on left. it sparked fine. coil on right no spark so i changed wires from left coil to right coil and right coil sparked.there are two small wires that go from each coil back to this 3"x3"x1"thick black looking module part.is this module gone bad if so any idea where i can purchase and how much this may cost. part number p/n 339-452 a7 manufactured may 13 1987.
thank you in advance vern.
thank you in advance vern.