What is a carburetor check valve?
What is a carburetor check valve?
The check valves are what makes your fuel pump work. If you understand how the fuel pump works on your carbs you will realize that a bad check valve means your carb isn’t pumping at its normal flow rate.
How does Zama carb work?
engine runs, fuel is being drawn from the metering chamber in the carburetor. This causes the metering diaphragm to move up and contact the metering lever. The fuel pressure from the pump is then great enough to overcome the spring pressure on the inlet needle and fuel flows into the metering chamber.
How do I identify my Zama carburetor?
On a Zama carburetor there are 2 sets of numbers that need to be acquired that are located on BOTH sides of the carburetor. For example on one side you may see C1U,C1Q,or C1M while on the other side you may K23, S118 or EL35 respectively. The actual Zama carburetor number would be C1U-K23, C1Q-S118 and C1M-EL35.
How do you adjust a carburetor on a Zama C1U?
How to Adjust a Zama Carburetor
- Set the engine on a hard, flat surface.
- Gently turn the “L” and “H” adjustment screws clockwise until they seat with the flathead screwdriver.
- Start the engine and allow to run for two to three minutes until the engine is at the operating temperature.
Where is the model number on a Zama carburetor?
Zama Model Number Lookup:Zama carb model numbers are located on the sides of the carburetor. On one side, you’ll usually see one letter followed by one number followed by another letter. On the other side, there’s usually one letter followed by one or two numbers followed by another letter (i.e.: C1UK27B).
Where are Zama carburetors made?
Locations of Zama group and tasks in Guangdong, China serves as the production location of Zama Group. Approximately 1,600 associates produce electronic fuel injection systems, carburetors, oil pumps, solenoid-valves and other parts for the outdoor industry.
How do I know if my diaphragm carburetor is bad?
Signs of the End The symptoms of a bad diaphragm are similar to other mower problems. Refusal to start or cutting out during running may be the first sign of a problem. The mower may smoke excessively or sound sluggish. At high speeds, the motor is more likely to give out or seem like it is starving or flooding.
Can you blow air through a Zama carb?
Before you do anything to a Zama carb I would recommend reading all the Service Tips. Especially DO NOT BLOW COMPRESSED AIR THROUGH A CARB WITH CHECK VALVES. It seems you also have to be careful with aerosol carb cleaner if directed straight into the valve with an extension tube.
How do you test a Zama nozzle assembly check valve?
The jet at the bottom of the metering chamber is the main jet which Zama call the “Nozzle Assembly Check Valve”. Stihl call it the “Valve Jet”. The hole in the middle, which is normally hidden by the metering lever leads to the idle circuit. To test both circuits use a piece of hose over the jet and blow with your mouth.
Where is the main jet on a Zama nozzles?
The jet at the bottom of the metering chamber is the main jet which Zama call the “Nozzle Assembly Check Valve”. Stihl call it the “Valve Jet”. The hole in the middle, which is normally hidden by the metering lever leads to the idle circuit.
Do I need a check valve on my carb?
Note: only butterfly carbs need check valves, another reason why I prefer barrel carbs. The check valves, idle and main, prevent air from entering the metering chamber when using the primer.