LAHDEK 5pcs Carburetor Diaphragm Gasket Kit Zama RB-158 Stihl HS81T HS81R HS86T C1Q-S140 C1Q-S140A

Five-piece carburetor repair kit

This kit supplies five complete carburetor diaphragm gasket sets for Zama RB-158 carburettors found on Stihl HS81T, HS81R and HS86T hedge trimmers. Each set contains the diaphragms and gaskets needed to reseal the fuel circuit during a standard rebuild. The parts are packaged as a ready-to-use lot for professional technicians or owners maintaining multiple machines.

Sustained sealing under vibration and heat

The diaphragms and gaskets are designed to maintain fuel metering during continuous two-stroke or four-stroke operation where engine vibration and fuel exposure stress the sealing surfaces. Consistent elasticity prevents lean-running conditions that appear after prolonged use rather than during initial start-up. Replacing all five sets at scheduled intervals keeps the carburettor performing to its original calibration.

Compatibility limited to Zama RB-158

This kit fits only the Zama RB-158 carburettor and the C1Q-S140 and C1Q-S140A variants used on the listed Stihl models. It will not suit carburettors with different model codes or machines outside the HS81T, HS81R and HS86T range. Verify the carburettor marking before ordering to avoid a mismatch.