I've had tons of Victa 2 strokes that people leave the throttle control in the stop position and after some time of compressing the spring in the carby the spring will loose it's tension and no longer open the poppet valve when the throttle is pushed down to full throttle ,most G4 /LM carburetors I will stretch the spring so the poppet opens and after I turn the mower off I will leave the throttle control in the full throttle position so the carby spring isn't under tension this also stops the kill switch rubbers deforming from constant tension.
