How does Zama carb work?

September 24, 2019 Off By idswater

How does Zama carb work?

➍ As the fuel and air mixture is drawn out of idle pocket it creates low pressure in the metering chamber. Atmospheric pressure pushes the metering diaphragm against the metering lever. This releases the spring pressure applied to the inlet needle and allows fuel to flow into the metering chamber.

What is the H and L on a carburetor?

“On every saw the “h” means that’s the “high” side adjustment. It regulates the fuel/air mixture that is being passed into the motor during high rpm’s. The “L” means that’s the “low” side adjustment. It regulates the fuel/air mixture that is being passed in the motor around the low rpm’s”

What does the diaphragm in a carburetor do?

The diaphragm is connected to the needle valve and as it moves inward it opens the needle valve to admit more fuel, thus replenishing the fuel as it is consumed. As fuel is replenished the diaphragm moves out due to fuel pressure and a small spring, closing the needle valve.

What to do if you have a Zama carburetor problem?

This section describes the procedure recommended to properly diagnose a Zama diaphragm carburetor problem on a two-cycle engine. If you have an engine performance problem and suspect the carburetor the first thing that must be done is to confirm that you actually have a carburetor problem.

How does the Venturi work on a Zama carburetor?

The Venturi is used to produce low pressure inside the bore of the carburetor. The low pressure pulls fuel into the bore from the metering chamber where it mixes with the air and is drawn into the combustion chamber. All the primer methods work basically the same. check valve.

What happens to choke valve on Zama chainsaw?

In most cases the fuel air mixture is too rich to allow the engine to run for a long time before it dies. After the engine starts or “pops” and dies in the full choke position the choke valve is then moved to the half-choke position. The engine is re-started and will continue to run in a rich condition.

What to do if you suspect a carburetor problem?

If you have an engine performance problem and suspect the carburetor the first thing that must be done is to confirm that you actually have a carburetor problem. Above is a trouble-shooting guide that can help you diagnose engine problems that can often be mistaken for the carburetor.