1E36F is China parlance for something like single cylinder-2 stroke-36mm bore-air cooled. There are dozens of manufacturers over there building 1E36F's. I have a list with 1E36F-2A, 1E36F-2AD, 1E36F-G1, 1E36F-G2.... I think the suffix will tell you if it is recoil or electric start and whether it has a reduction and what ratio. I think that "36's" are usually 33cc, stroke counts and may vary slightly. The 52's are usually 1E44F's (1E44F-2A etc) and 43's 1E40F's . I think that most of the 33's are clones of a Mitsubishi. MIKE