General description 3 X Ignition Coils for Mercury Mariner 6-225HP are high-quality replacement parts designed to ensure optimal performance of your outboard engine. These coils are brand new and made from durable ABS material, featuring a sleek black color. Technical specifications Replacement Part Numbers: 339-835757A3, 339-832757A4, 339-7370A13 Compatible Models: Mercury Mariner Compatible HP Ratings: 6HP to 225HP Measurement allowed error: +/- 1-3 cm Compatibility and accessories 6HP Serial Numbers: A197112 - T800749 8HP Serial Numbers: A197112 and up 9.9HP Serial Numbers: A197112 and up 10HP XR Serial Numbers: D038000 and up 15HP Serial Numbers: B292414 and up, G044027 and up 18HP Serial Numbers: 5837437 and up 20HP Serial Numbers: 3537531 - 3755884, Jet Serial #s G044027 and up 25HP Serial Numbers: 5705532 and up 30HP Jet Serial #s: C159200 - G589999 35HP Serial Numbers: 6445653 and up 40HP Serial Numbers: C159200 and up 45HP Serial Numbers: 5531630 and up 55HP Serial Numbers: