Gw250 throttle position

Location of throttle oil pipe behind Gw250 engine. In order to balance the pressure of the intake needle valve of carburetor and keep the float stable, the oil return pipe must be unblocked. If the oil return pipe is blocked, especially when the engine load increases too fast or the throttle fluctuates, too high gasoline pressure will cause the seal of the intake needle valve to be relatively lax, the oil in the float chamber will increase, and gasoline will flow into the cylinder from the carburetor.

Working principle of throttle tubing

Throttle valve is a controllable valve, which is used to control air to enter the engine. After entering the intake pipe, it is mixed with gasoline (the mixing parts of different models of cars are different) to become combustible mixture, which participates in combustion and does work. Four-stroke gasoline engines are generally like this. Throttle is the most important component in today's EFI automobile engine system. Its upper part is the air filter and the lower part is the engine body, which is called the throat of the automobile engine.