A Guide of Carburetor Adjustment

Generally speaking, a two cycle engine has a complete power cycle in the two piston strokes, say, the upper stroke and the down stroke. The upper cycle compresses the fuel mixture and ignites it at the stroke top. It is exhausted when the down stroke begins. While a new fuel mixture gets introduced at the bottom of the down stoke into the cylinder and the cycle begins all over again. Recently, a 2-cycle carburetor tends to be common in small engines, for example, you can find these motorcycle carburetor in snowmobiles, boat motors, lawn trimmer, etc.
However, carburetors need to be adjusted regularly. Then, why? First of all, the screws will get loose over the time. On the other hand, fuel mixtures also make slight changes to the trimmer head. Considering that the settings of the carburetor affect trimmer performance, the right adjustments needs to be made to guarantee the performance. Besides, the adjustment ensures a smooth running of the engine and it should also be coupled with cleaning at the same time since a clogged air filter and deposits within the carburetor could also greatly affect the performance of the engine.
Unlike what many people might think, the adjustment actually is not that hard. It sure might seem challenging at first, but using the right carburetor adjustment tool, you will not need a mechanic or an engine expert to do the work with you. The following is the guide of the adjustment of a carburetor.
Step 1: Identity the high speed and idle screws on the carburetor. They are labeled H and L so this should really not be hard for you to identify. You will also see the third screw marked T and this is the throttle screw which determines how fast the unit idles when the carburetor has been adjusted.
Step 2: Ensure that the H and L screws are completely closed before you then open them two turns each using your carburetor adjustment tool.
Step 3: Crank the motor and let the unit warm up, then turn the choke lever to have the unit running. You might need to open the unit by depressing the throttle.
Step 4 - With the unit idling by itself, slowly turn the idle screw in till your unit starts dying, then stop the turning and back the screw out at least to a quarter or half turn to the suitable position.
Step 5: Holding the throttle wide open, slowly start turning the high speed screw in until you can hear your engine beginning to smoothen out and to rev high. Back the screw out again when the engine starts pitching until the unit starts slowing down or running rough. Let the high speed screw remain in the middle of the high and low point you have found. You can easily tell the best point by being keen on where the unit runs smoothly.