A rebuilt H4 magneto for IH tractors. This is used on gas engine models. A, AV, B, BN, C, H, HV, Super HV, I4, I6, I9, M, MV, O, O4, O6, W4, W6, and Super A, AV, C, H, HV, M, MV, MTA. All rebuilt magnetos are completely disassembled. All parts are cleaned and inspected. Bearings were cleaned and packed with new lube. New coil was installed if old failed testing. New points, and condenser were installed. Front impulse coupler was lubed and installed. Rotor was cleaned and installed or replaced if needed. Coil cover and distributor cap were cleaned and painted, or replaced with new if defective. Was assembled with new gaskets. Was test run on bench. Impulse works properly, and sparks 5/16 at minimum-at cranking speed consistently. At run speed spark jumps minimum of 5/16 consistently, and run timing was checked at 35 degrees as the book specifies for this model magneto. If you are unsure of the condition of you core you can send us pictures of it if you would like. Please ask if you have any questions.