Bubba, I have a 1978 90hp mercury inline six. Great engine and have had great service but am in need of a new cap and plug wire set, or think I am. The engine has an intermitten miss on two plugs, numbers 3 and 6. I used a spark tester and when they spark its a good spark but doesn't always spark. The cap and wires have been on it since 78. I have another engine for parts. This cap and wires are the originals also. I changed the two wires and helped no. 6 but not 3. I have checked with napa and oreilly and they cant get the parts. Do you or anyone know where I might order these? Thanks.