1. GENERAL INFORMATION MOVIE SYSTEM TROUBLESHOOTING ENGINE WILL NOT START OR IS HARD TO START Inspection/Adjustment Symptom Probable Cause Check if fuel reaches carburetor by loosening drain screw Empty fuel tank Clogged fuel line between fuel tank and carburetor Fuel does not Clogged float oil passage Fuel reaches Clogged fuel tank cap breather carburetor reach carburetor hole Clogged fuel filter Clogged fuel strainer Faulty auto fuel valve Remove spark plug and install it into spark plug cap to test spark by Faulty charging system connecting it to engine Faulty spark plug ground Fouled spark plug Faulty CDI unit Spark jumps Weak or no spark Faulty pulser coil Broken or shorted ignition coil Broken or shorted exciter coil Faulty ignition switch Weak or dead battery Test cylinder compression Faulty starter clutch Valve clearance too small Improper valve and seat contact Normal Low or no Worn cylinder, piston and piston compression compression rings Leaking cylinder head gasket Seized valve Improper valve timing Start engine by follow-ing normal starting procedure Faulty auto bystarter Engine does not Engine fires but Air leaking through intake pipe fire does not start Incorrect ignition timing Incorrectly adjusted pilot screw Remove spark plug and inspect again Flooded carburetor Dry spark plug Wet spark plug Faulty auto bystarter Throttle valve excessively open 1-23