Electrical pertains to the electric starter system, charging system, lights, etc...... You are speaking of a possible "Ignition" problem. There is a difference,
First step is to actually check the spark by using a tester (available at most auto part stores) whereas you can set an adjustable air gap... set the gap to 7/16"... Note that the gap is important.
You can make a multi spark tester as follows (below)... and some members have designed various testers that would put mine to shame (they may jump in here)... BUT... you can build mine quickly with a "hammer".
Remove the spark plugs (all of them) first in order to obtain the fastest cracking rpm. The spark should jump that 7/16" gap with a strong blue lightning like flame... a real SNAP! If this is the case, you do not have a ignition problem.
Let us know what you find.
********************
(Spark Tester - Home Made)
(J. Reeves)
You can use a medium size philips screwdriver (#2 I believe) inserted into the spark plug boot spring connector, then hold the screwdriver shank approximately 7/16" away from the block to check the spark or build the following:
A spark tester can be made with a piece of 1x4 or 1x6, drive a few finishing nails through it, then bend the pointed ends at a right angle. You can then adjust the gap by simply twisting the nail(s). Solder a spark plug wire to one which you can connect to the spark plug boots, and a ground wire of some kind to the other to connect to the powerhead somewhere. Use small alligator clips on the other end of the wires to connect to ground and to the spark plug connector that exists inside of the rubber plug boot.
Using the above, one could easily build a spark tester whereas they could connect 2, 4, 6, or 8 cylinders all at one time. The ground nail being straight up, the others being bent, aimed at the ground nail. A typical 4 cylinder tester follows:
..........X1..........X2
.................X..(grd)
..........X3..........X4
This can obviously be modified to a 6 or 8 cylinder setup tester.
********************