Locate the idle mixture screw and turn it clockwise until the needle lightly touches the seat. Then, turn the screw counterclockwise 1-1/2 turns. If your carburetor has a main jet adjustment screw at the base of the float bowl, turn the screw clockwise until you feel it just touch the seat inside the emulsion tube.When it's at running temperature, find the 2 screws on your carburetor that adjust the air and fuel mixture. You can then use a screwdriver to adjust both screws ¼ turn at a time until your engine purrs smoothly. To adjust your idle speed, find the idle mixture screw that limits the flow of fuel at idle.Once the air fuel mixture screws have been properly adjusted, and the engine runs smoothly both at idle, and when revved, it is time to locate the idle mixture screw. The idle mixture screw controls the air fuel mixture at idle speed, and often is located near the throttle plate.Initial valve settings. Next, turn the load valve (refer to your operator's manual to identify the load needle) out 1½ turns and then turn the idle valve out two turns. Turn on the gas to the carburetor and set it for a slight amount of choke. Position the throttle up from its idle stop.
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Locate the idle mixture screw and turn it clockwise until the needle lightly touches the seat. Then, turn the screw counterclockwise 1-1/2 turns. If your carburetor has a main jet adjustment screw at the base of the float bowl, turn the screw clockwise until you feel it just touch the seat inside the emulsion tube.When it's at running temperature, find the 2 screws on your carburetor that adjust the air and fuel mixture. You can then use a screwdriver to adjust both screws ¼ turn at a time until your engine purrs smoothly. To adjust your idle speed, find the idle mixture screw that limits the flow of fuel at idle.Once the air fuel mixture screws have been properly adjusted, and the engine runs smoothly both at idle, and when revved, it is time to locate the idle mixture screw. The idle mixture screw controls the air fuel mixture at idle speed, and often is located near the throttle plate.Initial valve settings. Next, turn the load valve (refer to your operator's manual to identify the load needle) out 1½ turns and then turn the idle valve out two turns. Turn on the gas to the carburetor and set it for a slight amount of choke. Position the throttle up from its idle stop.
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