Solid State Module / Briggs & Stratton 590781Pack Size:1Briggs & Stratton 394891, Briggs & Stratton 590781ESF 147-075, Foley/Belsaw 5979518, Foley/PLP 147-075, J. Thomas 394891, Laser L4613, Laser 98195, NHC 265-1541, Oregon 33-345, Prime Line 7-01644, Rotary 8051, Sunbelt SB-8051, Sunbelt 17005, Sunbelt B117005Briggs & Stratton L-head twin cylinders from 400400-422700, 422707-1529 and 42A707-1238