You should see an unobstructed round hole. Jet Cleaning: Inspect jets by holding to light and look through them. Look for spray cleaner to exit from one or more passageways. Inspect and clean each passageway with spray cleaner, brushes/pipe cleaners/etc, and compressed air. The union is plugged with a brass or bronze bead. To change direction, another angled passageway must be drilled. Machines can only drill straight through the cast passageways. Do not disassemble individual carbs from the carb bracket.Īir & Fuel Passageways: Trace and learn individual fuel and air circuits from beginning to end. These parts usually include vacuum diaphragms, needle valves, o'rings, hoses, and other parts. Warning: Remove all rubber parts before you begin. Vacuum leaks and carburetor synchronization also effect performance and should be inspected and adjusted following the below procedures. All are important in function and when obstructed or not working properly, have subtle to radical effects on engine performance. There are many passageways and openings to check and clean. The elements of internal combustion engines are: correct fuel/air ratio, spark at right time, adequate cylinder compression.
