This repair kit fits the Jonsered model 520 with a Tillotson carburetor. One New carburetor repair kit for the following Tilltoson series carburetors. Complete kit for these HK carburetors: HK-7, 7B, 7C, 9A, 9B, 9C; HK-10C, 10D, 10E, HK-12A, 12B, 12C; HK-15B, 15C; HK-16D, HK19A, 19C, HK-20A, 20B, 20C; HK-21, HK-23A, 23B, 23C, 23D, 23E; HK-27B, HK-28C, HK-29, HK38A, HK404A, HK-13A thru D, HK21B, C, HK-30A, HK-37A, and HK-40B.
