1981-1984 Official Honda ATC250R Shop Manual, Page 181Get this manual
ATe 2S0R 1I!
16TROUBLESHOOTING
16161616 -4 16 -4
ENGINE DOES NOT SrART OR IS HARD TO START ENGINE LACKS POWER POOR PERFORMANCE AT LOW AND IDLE SPEEDS POOR PERFORMANCE AT HIGH SPEEDS POOR HANDLING
ENGINE DOES NOT START OR IS HARD TO START
CHECK 1Check if fuel is reaching carburetor FUEL REACHING CARBURETOR SYMPTOM PROBABLE CAUSE FUEL NOT REACHING(1) No fuel in fuel tank (2) Clogged fuel line from tank to CARBURETOR carburetor (3) Clogged carburetor float valve (4) Clogged fuel tank cap breather hole WET(1) Carburetor flooded (2) Carburetor choke excessively closed (3) Throttle valve excessively opened NO SPARK OR SPARK- (1) Faulty spark plug (2) Fouled spark plug ISWEAK (3) Faulty COl unit (4) Broken or shorted high tension wire (5) Broken or shorted ignition coil (6) Faulty main switch (7) Faulty AC generator (8) au Ity pu Ise generator (9) Pulse generator rotor air gap incorrect LOSS OF COMPRESSION (1Piston rings stuck in ring lands (2) Flaw in casting (3) Compression leak past crankcase (4) Faulty or clogged reed valve (5) Worn cylinder and piston rings (6) Blown cylinder head gasket ENGINE FIRES BUT- (1) Excessively open choke (2) Choke stuck closed STOPS SOON (3) Air leaking past manifold (4) Improper Ignition timing (COl unit or pulse generator faulty)