Carburetor Rebuild Diaphragm Kit — Zama C1Q-S167 Compatible for Stihl TS410 / TS420 / TS500i

This aftermarket carburetor rebuild kit is engineered as a compatible replacement for the Zama GND-100 / RB-99 repair kit used in Zama C1Q-S167 carburetors fitted to Stihl TS410, TS420, and TS500i concrete and masonry disc cutters (cut-off saws). A degraded metering or pump diaphragm is the most common cause of hard starting, lean running, and fuel delivery failure in these units. The kit includes all wearable internal components: metering diaphragm, pump diaphragm, inlet needle and seat, gaskets, and spring. Packaged as a complete rebuild — restores full carburetor function without replacing the carb body.