I have a 1960 Merc 600 60hp with no spark to #4 Cylinder. I just replaced the distributor cap and rotor before the problem. It ran really rough so I noticed that the point#4 in the distributor cap is not getten any contact, the rest of them are getting contact because there where black stains on them, but the #4 is clean! The five other cylinders are getting spark but #4. PLEASE HELP! 
