Feature:1. Part Number: According to the original factory specifications, ignition coil kit replacing OEM are 541 0522, 166 0820, HE166 0761, HE541 0522.2. Applicable Model: Engine ignition coil kit, replacement for Onan Points Models BF B43 B48 NHC CCK, you must check your engine model.3. High Performance: Ignition coils are electrical parts used in vehicles to generate high voltage sparks to ignite fuel and start the engine.4. Good Replacement: Engineered to strict OE specifications, our ignition coils look and function the same or better than the original ignition coils.5. Premium Material: Ignition coils are made of quality ABS and alloy materials for durability and reliability in extreme conditions.Specification:Item Type: Ignition Coil KitMaterial: ABS, AlloyPrimary Resistance: 3.12ΩPrimary Inductance: 6.67mHSecondary Resistance: 20.5KΩSecondary Inductance: 41.30HPrimary Resistance: 4.25ΩPrimary Inductance: 9.48mHSecondary Resistance: 37.85KΩSecondary Inductance: 59.96HReplaceable OEM: 541 0522, 166 0820, HE166 0761, HE541 0522Fitment: For Onan Points Models BF B43 B48 NHC CCKFor P218G engine Serial numbers 420,001 to 999,000 and Serial numbers 10,001 to 120,000For Onan P218G engine in the tractor. No serial number range is affected, you must check your engine model. If you have engine for Kohler in your 317, this coil will not work.For P218G engine Serial numbers 420,001 to 999,000 and Serial numbers 10,001 to 120,000For P220G engine Serial numbers 420,001 and above.Package List:1 x Ignition Coil3 x Mounting Bolt1 x Mounting Bracket1 x Lock Clip1 x Capacitor1 x Insulation Sleeve1 x Connection TerminalNote:1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!