How to adjust the mixing ratio of tnt 150 carburetor?

1. First, tnt 150 turns the carburetor mixing ratio screw to the bottom clockwise, and then turns it counterclockwise 1.5 turn. Start the engine, let the engine warm up for 10 minute to make the engine reach the normal working temperature, and adjust the carburetor idle speed adjustment screw to make the engine run at the lowest speed and keep the engine running.

2. Secondly, repeatedly adjust the carburetor mixing ratio screw to make the engine speed reach the highest, quickly turn the throttle handle, refuel violently, and then loosen the throttle. During this process, observe whether the engine accelerates and decelerates smoothly.

3. After the carburetor is finally adjusted, a road test of about 1.5km can be carried out. After the road test, remove the spark plug and observe the color of the ceramic under the center electrode of the spark plug. If it is brick red, it is normal.