2. GENERAL INFORMATION STRYKER 125/150 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 Clogged float valve Clogged fuel filter Fuel reaches Fuel does not Clogged fuel tank cap breather carburetor reach carburetor hole Clogged fuel valve strainer Clogged fuel valve passage Remove spark plug and Clogged carburetor air balance install it into spark plug tube cap to test spark by making it contact the Faulty spark plug engine Fouled spark plug Faulty CDI unit Spark jumps Weak or no spark Faulty pulser coil Faulty exciter coil Faulty ignition switch Broken or shorted ignition coil Test cylinder compression Faulty or slipping clutch Normal Low or no Valve clearance too small compression compression Valve stuck open Worn cylinder and piston rings Leaking cylinder head gasket Start engine by follow- ing normal starting procedure Faulty choke control system Engine does not Engine fires but Leaking intake manifold 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 Throttle valve excessively open Clogged air cleaner 2-21