What Causes a Scooter to Fail to Start After Being Exposed to Rain?
1 Answers
Scooters failing to start and experiencing throttle issues after being exposed to rain are generally caused by water entering the air filter, fuel tank, or carburetor, or moisture affecting components such as the ignition coil, high-voltage coil, high-voltage wire, spark plug cap, ignition switch, or ignition system wiring. If the spark plug or high-voltage damping cap has cracks, water can easily seep in during rainy or foggy conditions, leading to short circuits and engine stalling. Carefully inspect the spark plug or high-voltage damping cap connection for cracks or loose connections and replace them if necessary. Pay special attention to the scooter's electrical wiring. If water is present at wire connections or electrical plug points, it can cause short circuits and stalling. Thoroughly inspect and clean these connections, removing any moisture. Finally, use a hairdryer to dry the damp areas (move the dryer slowly and avoid focusing on one spot to prevent melting the wires). The air filter on scooters is typically positioned low and at the rear of the vehicle. If the air filter cover is not tightly secured, water can easily enter and be sucked into the carburetor, causing fuel starvation and stalling. Open the air filter cover to check for moisture and remove it if present. Carburetor icing can also occur. When air humidity exceeds 90%, moisture-laden air passing through the carburetor throat is rapidly cooled due to fuel atomization, leading to ice formation that blocks or partially obstructs the nozzle, fuel passages, or air passages. This restricts fuel or air flow, resulting in poor fuel mixture and spontaneous stalling. In such cases, waiting a few minutes for the ice to melt will resolve the issue.
