spark problem

jeff6898

Petty Officer 2nd Class
Joined
May 23, 2008
Messages
106
1979 85hp 85999R

Was having problems with the spark on the top left plug. Took it to a shop and they fixed something called the trigger wire, said it was coroded so they cleaned it up and ran great for a while. Now the spark in the same plug is gone again. It seems to come and go, Just that one though. Any ideas?
 
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