Daelim S4 50cc Service Manual - Mojo

FUEL SYSTEMTROUBLESHOOTINGThe vehicle does not start.● No gasoline in fuel tank.● Fuel is not coming out of carburetor.● Too much fuel is flowing into cylinder.● No spark emitted from spark plug.● Air cleaner is blocked.Idle is unstable and engine turns off after starting.● Idle is adjusted improperly.● Air/fuel mixture is either too lean or rich.● Air cleaner is blocked.● Suction system is experiencing secondary intake of air.● Fuel system is blocked.● Auto bystarter is damaged.● Ignition system is damaged.● Using low quality gasoline.● Air screw is adjusted improperly.● Carburetor is blocked.● Compression pressure is low.Back firing● Ignition system is damaged or works improperly.● Mixture is too lean.Insufficient power and high fuel consumption.● Air cleaner is blocked.● Ignition system is damaged.● Mixture is too rich.Air/Fuel mixture is extremely lean● Jets of carburetor are blocked.● Bad ventilation of air in tank cap.● Fuel strainer screen is blocked.● Fuel tube is bent, creased or blocked.● Float valve is working badly.● Oil level is low.● Suction system is receiving secondary suction of air.● Output capacity of fuel pump is insufficient..Miss-fire at speeding.● Ignition system is damaged.● Mixture is too lean.Air/Fuel mixture is extremely rich.● Float valve is damaged.● Air jets are blocked.● Oil level is too high.● Auto bystarter is damaged.● Air cleaner is blocked.