How to adjust the working height of the carburetor float

The carburetor is an important part of the engine. Whether the technical condition of the carburetor is good or not has a great impact on the normal operation of the engine.

Whether the working height of the oil float of the carburetor meets the technical requirements has a great impact on whether the carburetor can work normally. If the working height of the oil float is too high or too low, the oil level of the carburetor will be too low or too high. If the combustible mixture provided by the carburetor to the engine is too thick or too lean, it cannot meet the needs of the engine's various working conditions, and malfunctions such as insufficient engine power and high fuel consumption will occur.

When the working height of the oil float is too high or too low, it will affect the normal operation of the carburetor, and the working height of the oil float should be adjusted in time. The adjustment of the working height of the oil float is often done by prying the adjusting piece on the oil float. The carburetor body is inverted to make the oil float sag under the action of its own weight, and then the working height of the oil float is checked with special tools. After testing, it is confirmed that the working height of the oil float is too high or too low. When adjustment is needed, the adjusting piece can be pried up and down, the fuel supply of the carburetor is reduced and the combustible mixture becomes thinner. Pry up the adjusting plate, the working height of the oil float decreases, the oil level of the carburetor rises, the oil supply of the carburetor increases, and the combustible mixture becomes thicker.
Adjusting the working height of the oil float seems to be done by prying the adjustment piece, but it is not that simple. Under normal circumstances, as long as the use of a small gong wire knife to pry the adjustment piece of the oil float, you can complete the adjustment of the working height of the oil float. However, due to the long-term work of the carburetor, the working part of the triangle oil needle and the needle valve seat will produce a certain amount of wear, and the tail end of the triangle oil needle will also produce wear, which will reduce the working height of the oil float, and the carburetor The oil level is raised. In this case, if you simply pry the adjusting plate and adjust the working height of the oil float, the adjusting plate will form a large angle with the tail end of the triangular oil needle. When the oil float lifts the triangular oil needle to close the triangular needle valve, it will generate forces in two directions at the tail end of the triangular oil needle. One is the force of lifting the triangular oil needle to close the triangular needle valve, and the other is the force of pushing the triangular oil needle to push the needle to the side of the needle valve seat, the movement resistance of the triangular oil needle in the needle valve seat increases, and the effective cooperation pressure between the triangular oil needle and the needle valve seat decreases, which will cause irregular closing failures, and the oil level often increases, or the carburetor has oil leakage. Failure, this kind of oil leakage sometimes, sometimes without oil leakage failure, is more troublesome to eliminate, mainly because it is difficult to completely eliminate it at one time. The reason for this situation is that the angle formed between the adjusting plate and the end of the triangular oil needle is too large.
To completely eliminate the fault, first shorten the distance between the triangle oil needle and the adjustment piece, and then fine-tune the adjustment piece. Due to the different structure of the oil float, the treatment method is also different. For the oil float with a plastic connecting bracket, the working position of the needle valve seat can only be improved to shorten the distance between the triangular oil needle and the adjusting plate. For the oil float where the connecting bracket is metal, the method of changing the working position of the tab can be used. The method is to remove the float pin and the oil float from the carburetor, penetrate the float pin into the oil float hinge, clamp the root of the adjusting piece with pointed nose pliers, and gently pull it to make it wind a little and how much, depending on the specific situation, it is appropriate to level the adjusting piece and be just perpendicular to the tail end of the triangular oil needle, so pry the adjusting piece to adjust the working height of the oil float, the adjusting piece will not form a large angle with the tail end of the triangular oil needle, which can ensure that the working height of the oil float is in the normal position. The tail end of the triangular oil needle will only bear the force of lifting and closing the triangular needle valve. The movement resistance of the triangular oil needle is very small, the triangular oil needle and the needle valve seat will cooperate well, and the carburetor will not leak oil from time to time.