2003 honda 250cc atv starting problem .changed ignition module and coil .have power to coil but no spark when i hit the starter button.

Silly questions! Is this a kick or button start? Is there a security 'Dead' switch fitted to the ATV that you have left on? Have you changed the actual spark plug? Is the Battery fully charged? Turn all the other features off that you can on the ATV before you start it. This stops any other drains on the voltage at starting.

try cheeking your coil

REPLACE DISTRIBUTOR CAP AND ROTOR.AND PLUGS WIRES.IF GETTING NO SPARK TO PLUGS.CHECK SEE IF IGNITION COIL GETTING POWER.IF NOT CHECK IGNITION FUSE.IF POWER GOING TO COIL.FAULT EITHER COIL IS OPEN OR FAULT IN THE IGNITION MODULE IN THE DISTRIBUTOR.

CHECK TO SEE IF IGNITION COILS AND MODULE GETTING BATTERY POWER.IF NOT CHECK THE IGNITION FUSE.IF FUSE OKAY.YOU HAVE FAULTY IGNITION MODULE OR BROKE WIRE TO IGNITION COILS AND IGNITION MODULE..

Either the spark plug is faulty or the coil pack is faulty.The spark plugs get power to spark from coil packs.

If the engine has no spark, check for voltage at the coil positive terminal when the ignition key is on. If NO voltage, then problem is on the trigger side of the coil (pickup, crank sensor, ignition module or primary wiring circuit).

But If there is NO voltage at the coil itself, then in that case the problem is on the supply side (the ignition switch or ignition wiring circuit).

But if the coil has voltage, then problem may be a bad high voltage output wire from the coil to spark plugs or hairline cracks in the coil output tower.------Getting this all possibilities checked will point towards the exact faulty part which is to be replaced.----------This should help.Thanks.Helpmech.

Spark plugs, cables, Ignition Control Module, Ignition Coil, in that order.

Could be the ignition coil or ignition module. Also check the ignition fuse.

try replacing the battery with a big boar 350