Delco 4 Cylinder Spark Plug Wire Set | United Ignition Wire 105 8mm ignition wire set fits GM 4 cylinder marine engines with Delco conventional ignition distributors. Delco 4 cylinder conventional ignition marine spark plug wire set For Crusader 153 model 4 cylinder engines from 1961-69 with Delco point type distributors For Mercruiser 60 thru 140 model 4 cylinder engines from 1963-89 with Delco point type distributors For OMC 88, 90, 100 thru 140 model 4 cylinder engines from 1964-90 with Delco point type distributors 8mm SSC 100% Silicone wire for ultra low resistance of 270 Ohms per foot Carbon-latex coating for superior EMI/RFI suppression Heavy duty booting used to maintain dielectric properties Stainless steel and brass terminals for longevity and superior conductivity Replaces Mercury 84-816761Q5, 84-816761A5, 84-813720A5, 84-813720A5, 84-43376A5, & 84-816761T5 Replaces OMC/BRP 503748