1968 3cyl, 55hp Rude, power loss

[Arrythmic_Mike]

Its a 1968 3cyl 55hp evinrude, all electrical has been replaced, modulator, rectifier, stator, coil, selinoid, all wires, plugs and all harneses, there is nothing old at all in the electrical and i lost all spark.Since everythings ne i dont know where to begin, i checked all connections, replaced a few just for kicks, checked grounds, and replaced battery. It was running beautiful and it started misfiring like it was running on 1 cyl or firing out of order. It quit all together and i cant get any spark at all. how do i check eveything before i end up replacing it all again...please help, its my first boat and i cant affort to replace everything, need all the help i can get...<br /> mvogts@comcast.net