Why does my engine backfire through the carb?
Assuming all of your plugs and wires are in the correct locations and you haven’t messed with the timing at all, then the most common cause of backfiring through the carb (spitting or coughing) is in the morning when a carb’s air/fuel mixture is a bit too lean. That’s not too uncommon if the carb is a bit old.
How do you adjust a Weber carburetor?
First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). The engine should pick up speed and begin to smooth out. Back out ½ turn more, or until the screw does nothing or runs worse then turn back to the point where it ran its best.
Does backfire mean too rich?
Not only can a rich air/fuel ratio cause a backfire, a mixture that doesn’t have enough gasoline can cause a backfire, too. A “lean” mixture is one that doesn’t have enough fuel, and too much air.
What should I do after installing a Weber carburetor?
Weber Carburetors are preset at the Factory. Only make adjustments to the carburetor after the installation, and running the vehicle for the first time. After the carburetor is installed record the factory settings if needed in the future. Please save your sales receipt and all carburetor documentation for future use.
Where is the fuel inlet on a Weber carburetor?
Locate the fuel inlet pipe (see picture) on the carburetor and connect the supply line to it. Take the EGR hose and connect it to the fitting that was installed in the EGR plate. Locate the vacuum advance hose and connect it to the vacuum advance port on the carburetor. (see picture below)
When to call Redline Weber carburetor technical assistance?
The Weber Carburetor is a sequentially timed device to the motor like the distributor. Time taken in the setup will provide more fun later. If you should need to call REDLINE WEBER for technical assistance we will need to know your final settings to help. Technical assistance is free for the first 60 days of purchase.
How do you turn the choke on a Weber carburetor?
Make a mark on the plastic choke cap and the carburetor where the two surfaces meet. Loosen the three screws one turn. Hold the throttle about one third open and start twisting the thermostat cap (counter clockwise) until the choke plates fully close, then slowly turn the cap 1/8” (you should feel the spring tension in the choke tightening).