Do this by using the gas throttle. To make a proper carburetor adjustment, the Weed Eater engine needs to be warmed up. Step 5: With the Weed Eater engine running, begin to turn the "Lo" screw very slowly in the counterclockwise direction. At every quarter of a turn, control to see if the weed eater is performing as it should.. You will learn how to properly adjust your carburetor, which is the main cause of your problem, when the engine BOGS Down when throttling up, engine Won't St.
Push the throttle to full open and observe the engine. If the engine sputters, turn the "Hi" screw clockwise less than ¼ turn until it smooths out. The exact adjustment of the "Hi" screw setting depends on the size of the load, the Weed Eater head and the fuel's freshness. Step 6. Operate the Weed Eater.. The carburetor settings drastically affect the performance of your trimmer. All the weed eater trimmers use a two-stroke engine where oil is added to the fuel manually at a preset fuel to oil mixture. To adjust your carburetor you will need to find the two fuel adjustment screws on the carburetor body. The screws are highlighted as HI and LO.