Introduction An ignition coil/spark coil is an induction coil in an automobile's ignition system that transforms the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel. The amount of energy in the spark required to ignite the air-fuel mixture varies depending on the pressure & composition of the mixture, & on the speed of the engine. An ignition coil consists of a laminated iron core surrounded by two coils of copper wire. Maxpeedingrods provides ignition coils compatible for Mercury series. Application 40HP C159200-D055047 1989-1991 40HP D055048-OG2910311991-1996 40HP Jet C159200-OG589999 1989-1997 45HP 5531630-B3931901981-1989 50HP 4357640-65866241976-1985 80HP 4831999-64329001978-1983 80HP Jet D283222-OG437999 1994-1997 85HP 4366802-48319981976-1977 100HP B209468-OG437999 1988-1996 115HP C100000-OG437999 1989-1997 125HP D283222-OG437999 1994-1996 Specification Replaces Part Number: 332-5772A1, 332-5772A2, 332-5772A...