1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 230Get this manual
19TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO START ENGINE LACKS POWER POOR PERFORMANCE AT LOW AND IDLE SPEEDS POOR PERFORMANCE AT HIGH SPEEDS 19-4 19-1 19-2 19-3 POOR HANDLING 19-4
ENGINE DOES NOT START OR IS HARD TO START
Probable Cause
1Checkif fuel is getting to carburetor GETTING TO CARBURETOR
NO FUEL TO CARBURETOR
111 [21 [31 [4[
2Try spark test GOOD SPARK
No fuel in fuel tank Clogged fuel ube or fue1 filter Clogged float valve Clogged fuel tank cap breather hole
WEAK OR NO SPARK -_
111 Faulty spark plug
[2[ (3) (4) (5) (6) (7) (8)
Fouled spark plug Faulty COl unit Broken or shorted spark plug wire Faulty alternator Broken or shorted ignition coil Faulty pulse generator Poorly connected, broken or shorted wires (9) Pulse generator rotor gap Incorrect 1101 Faulty ignition switch
LOW COMPRESSION- (1) low battery charge (2) Valve clearance too small (3) Valve stuck open (4) Worn cylinder and pistion rings (5) Damaged cylinder head gasket (6) Seized valve (7) Improper valve timing