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Oops yours shoud be like this
http://maxrules.com/graphics/omc/wiring/18-25_EL-START_TO_1972.jpg
that motor came with shorting wires to kill the motor the two smaller wires go to the points and when you short them together it will kill the spark. Do you have the points set at exactly .020" that is ignition timing. Did you install the plug wires into the coils push the grommets up and then install them into the armature plate. On the bottom front of the coils where they mount is called the bosses you want the front edge of the coil laminate flush with the bosses, use a straight edge that gets the proper gap between the coil and magnets in the flywheel. The start circuit is separate from the ignition completely if the starter works leave it hooked up. Just go through the ignition and gap the points and align the coils. Be sure and torque the flywheel nut to spec and isolate the kill wires if you have them. You can kill the motor with the choke it just makes it harder to start when you flood it.
http://www.ebay.com/itm/Evinrude-25..._Accessories_Gear&hash=item2c6d9d0631&vxp=mtr
The second schematic I gave you is the one you want to use