Not Getting Spark to any cylinders, 50hp 2 stroke, please help

olbuddy50merc

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Jul 28, 2009
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I have a 1991 2-stroke mercury 50hp. (S/N 0D119779)Motor was running perfectly until i believe one of the spark plugs fouled out. I changed all the spark plugs the same day and when i went to crank it over none of the cylinders were getting spark. The distributor coils are getting power. How can i test for the source of the problem before i buy replacement parts? I am guessing its either the kill switch wire, voltage regulator or the switch box? Thanks.
 
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