Now insert the new copper washer and centralise.
Fit the new inlet seat and re-assemble with the new inlet needle.
Using an adaptor piece (Tillotson p.n. 243-506P) it is possible to check if the carb is now
sealing in the needle and seat before assembling fully.
Clean the metering and pump covers with carb cleaner and compressed air.
Fit the new gasket and diaphragms and tighten the Torx screw in a cross pattern direction so
the seal is uniform.