1. GENERAL INFORMATION GRAND DINK 250 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 carburetor fuel inlet tube, vacuum tube or fuel tube Clogged auto fuel valve Fuel reaches Fuel does not Clogged float oil passage carburetor reach carburetor Clogged fuel tank cap breather hole Clogged fuel strainer Remove spark plug and Clogged fuel filter install it into spark plug Faulty fuel pump cap to test spark by connecting it to engine Faulty spark plug ground Fouled spark plug Faulty CDI unit Spark jumps Weak or no spark Faulty A.C. generator Broken or shorted ignition coil Broken or shorted exciter coil Faulty ignition switch Test cylinder Starter motor idles but compression crankshaft does not rotate Valve clearance too small Improper valve and seat contact Normal Low or no Worn cylinder and piston rings compression compression Blown cylinder head gasket Flaws in cylinder head 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 fire does not start pipe 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 1-17