The way to Adjust the Carburetor to a Homelite Super VI Chain Saw

7 Aug

The way to Adjust the Carburetor to a Homelite Super VI Chain Saw

Homelite Super VI chain saws are equipped with a Walbro HDC diaphragm, and Tillotson HK or Walbro HDC carburetor based on their model and year number. All these carburetors use three screws to adjust the flow of fuel through the carburetor with the exclusion of ancient model Super VI chain saws. On most super VI models, the carburetor adjustment screws control the idle speed, idle mixture and high speed mixture settings, however older models frequently lack the high speed screwthread.

Locate the screws securing the cap on the left side of the chain saw’s motor and eliminate them. Pull off the cover and find the carburetor on the opposite of the saw supporting the bar and fuel oil caps. Search for three slotted screws on the top of the carburetor. The screw to the right is that the idle speed screw, the middle screw is that the idle mix screw and the screw to the left is that the high speed mixture screw.

Turn the idle and high speed mixture screws clockwise until they are totally screwed in without tightening them down. Turn both screws one complete turn counterclockwise to reset them to their default settings.

Start the motor and observe its behaviour at slow speed. Adjust the idle mix screw and idle speed screws clockwise one-quarter flip at a time until the chain begins to move to the pub while the motor is idling. Turn both screws one-quarter turn counterclockwise until the engine’s idle speed is right under the threshold where the clutch engages and the chain begins to move.

Adjust the idle mix screw as needed until the motor accelerates smoothly from idle to full power. If your saw has a high speed mixture screw, then adjust it as needed while the motor is running at full throttle until the engine runs smoothly without causing smoke. Turn the high speed mixture screw one-quarter turn clockwise at a time beginning at the default setting. Immediately turn the screw counterclockwise until the motor runs smoothly at full power when the motor begins to get rid of power.