Add to Favorite Sellers. Dwell angle is increased or decreased with changing engine RPM and operating conditions. Electronic Ignition II Conversion Kits have a safety feature to prevent the module from burning out if the key is left in the ON position. Fits tractors with 12 volt negative ground system only. Must use graphite style spark plug wires. DO NOT use stainless steel or copper wires. For graphite spark plug wires, please see: JJS12757 or JJS12729. Requires hot coil, please see: JJS15817. Replaces the points and condenser with an electronic module. Fits distributors with a screw held cap. Also fits: Clark Forklift # C20, C20SU, C20P, C25, C25U, CY20, C30, CY30, C40, CY40 all w/ Delco # 1112637, 1112673 Hyster Forklift # H20E, H25E, S20A, S25A, S30A, UE30, YE40, HE50 all w/ Delco # 1112637, 1112673 Hyster Forklift # S40, S50C w/ Delco # 1112677 Hyster Forklift # H30, H40, H50 w/ Delco # 1112666 Hyster Forklift # H40F, H50F all w/ Delco # 1112443. Don’t forget to leave us feedback and we will be sure to do the same! . Thank you for this opportunity to earn your business! Thank you for looking! We appreciate the opportunity to earn your business. Feel free to ask any questions you may have.