DELLORTO 40712600 EMULSIFIER AS260 PIAGGIO 190 APE MP 550 1967-1972 DELL'ORTO AS260 emulsifier for PHBH 30 carburetor for PHBH 30 carburetor Partial load or half gas can be achieved when the gas gate valve is 1/4 to 3/4 open. Jet needles and mix tube are competent to regulate the mix in this sector. Venturi tubes Together with the jet needle, the venturi tube is responsible for regulating the partial load. If the adjustment is too fat (engine stutters and throttle valves) and the jet needle is already in the lowest slot, then its time for a small venturi. The rule also applies here: the higher the number, the fatter the Rubè Venturi. In the part load range with a barely open throttle slide the engine should not purr stutter. If it doesnt hiccup when the gas is on, then youve got it right.#.
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