I have a 1988 Larson 18' Bowrider with a 3.0L OMC sterndrive. I had it out over Memorial Day weekend and it ran fine. It has been sitting since then. I tried to fire it up today and it will not start. I have fuel, but cannot get any spark, even directly from the coil to distributor wire. I have 12Volts at the main terminal of the Starter and 6 volts at the + terminal of the coil. The battery is new as of Memorial Day weekend. I can't find any wires that are loose/broken/etc. How should I troubleshoot what is going on, and does anyone have any suggestion on what to check first?