To prevent backfiring make sure the belt is tight and in good working order. Also clean the air filters regularly.
If it is backfiring only when you kill the engine, allow the engine to idle a few minutes before you kill it. If it is backfiring while in use, check the intake gasket and bolts for wear or looseness.
If it is backfiring the timing is set incorrectly or the spark plug wires are not connected in the correct order.
Backfiring.
The best answer for this is: Get a tune-up.
backfiring.
Probably. Backfiring is a symptom of a lean condition. Wouldn't want to leave it like that.
advance the timing a little.
Yes.
Needs a tune up
Backfiring in any motor is either badly out of time or a burnt valve.
yup it is more likely to break down well if its backfiring that's not good that can mean there is some seriuos internal problems
yes, backfiring is always due to ignition or timing problems. Backfiring through the carb can be a symptom of a lean condition.