Fits: Command Pro Twin 18 hp to 25 hp v-twin cylinder OHV engines including CH18 (with specification numbers 62509, 62511, 62513, 62536, 62542, 62588, 62596, 62599, 62601), CH20 (with specification numbers 64509, 64511, 64512, 64526, 64543, 64549, 64586, 64622, 64631, 64638), CH22 (with specification numbers 66510, 66531, 66534, 66538, 66540, 66542, 66549, 66550, 66552, 66556, 76516, 76517, 76518, 76564), CH23 (with specification numbers 76524, 76528, 76531, 76562, 76586, 76602, 76607, 76619, 76623), CH25 (with specification numbers 68543, 68550, 68561, 68573, 68585, 68597, 68604, 68606, 68624, 68689, 68695, 68707), CH620 (with specification numbers 3076, 3078, 3090), CH640 (with specification numbers 3040, 3074, 3098, 3110, 3113, 3122, 3126, 3134), CH680 (with specification numbers 3033, 3034, 3052, 3056, 3060, 3072, 3082, 3106, 3107), CH730 (with specification numbers 0003, 0004, 0016, 0028, 0029, 0104, 0127, 0129, 0137, 0138, 0144, 0155, 0159, 0169, 3213, 3225, 3271), CH740 (with specification numbers 0007, 0045, 0054, 0075, 0082, 0087, 3117, 3118, 3175, 3328) engine models.