This is a genuine OEM Toro 136-7885 Rocker Arm Kit for TimeCutter Lawn Mowers
Fits Models:
133-9971, Service Kit, LC1P92F1 Engine Piston and Cylinder Head Assembly
133-9973, Service Kit, 1P92F1 Engine Piston and Cylinder Head Assembly
139-0605, Service Kit, 1P92F1 Engine Piston and Cylinder Head Assembly
74665, TimeCutter ZS 4200S Riding Mower, (SN 403284295-999999999) 
74682, TimeCutter ZS 3200S Riding Mower, (SN 400000000-999999999) 
74684, TimeCutter ZS 4200S Riding Mower, (SN 400000000-999999999) 
74685, TimeCutter ZS 4200S Riding Mower, (SN 400000000-407149999) 
74685, TimeCutter ZS 4200S Riding Mower, (SN 407150000-409289999) 
74685, TimeCutter ZS 4200S Riding Mower, (SN 409290000-410149999) 
74685, TimeCutter ZS 4200S Riding Mower, (SN 410150000-411699999) 
74705, TimeCutter SS 4200 Riding Mower, (SN 403320567-404313999) 
74705, TimeCutter SS 4200 Riding Mower, (SN 404314000-999999999) 
74710, TimeCutter SS 3225 Riding Mower, (SN 402842615-404314199) 
74710, TimeCutter SS 3225 Riding Mower, (SN 404314200-999999999) 
74710TA, TimeCutter SS 3225 Riding Mower, (SN 400000000-999999999) 
74711, TimeCutter SS 4200 Riding Mower, (SN 403045174-404314199) 
74711, TimeCutter SS 4200 Riding Mower, (SN 404314200-999999999) 
74750, TimeCutter MX 3450 Riding Mower, (SN 404314000-404368690) 
74750, TimeCutter MX 3450 Riding Mower, (SN 404368691-999999999) 
75740, TimeCutter 4200 Riding Mower, (SN 400000000-407699999) 
75740, TimeCutter 4200 Riding Mower, (SN 407700000-409431743) 
75740, TimeCutter 4200 Riding Mower, (SN 409431744-410899999) 
75740, TimeCutter 4200 Riding Mower, (SN 410900000-412193899)