Greetings, I have 1986 Formula w/2 5.7 mercruisers and one runs fine the other wont start and has no sparc from coil, I have tried 2 other coils, still no sparc. <br />Engine did start the 1st time in the water but was missing/popping really bad, sounded like it would blow up or catch fire so I replaced the plugs, wires, cap and coil. Boat has no points, somebody must have updated the ignition, it has soemthing called a "micro switch" where the points should be. After the new parts it wont start and has no sparc. Thanks for any help you can offer as I have spent the last 4 weekends trying to chase down the problem.