Can a back fire cause motor to jump time

It could be a defect in your starter motor causing it to draw too much amperage

Back fire is a result of timing being off. If the mower does not have electronic ignition, the points can be worn causing a timing issue. Back fire is usually and ignition of unburned fuel igniting outside the cylinder such as in the exhaust system. A valve not seating usually causes low compression but rarely does it cause a back fire. Start there.

how to?
that? word? phrase?>
posted like 100000 times here, search much
no...
1:battery neg lug off. if not BOOM EAT ACID ! or go blind.
2: starter wires off starter;\
3: unbolt it.
4: falls hits yous head. Duck now! grin....
5: reverse above for back.

google much. 1,000,000 + hits...

its getting fuel to the carb but is the solenoid working on the bottom of the carb they stick and also safety switches go bad and kill the power going to it

Easier to test in the car. Put starter back in the car. First, please try to jump start the car. If it will jump and start, starter is OK. If it will not jump start, go to the starter with a screwdriver. Use the screwdriver to short the big red-wire terminal to the small terminal on the solenoid. Be very careful not to short the big red-wire terminal to anything else, or you will get a big spark. If the battery, starter, and solenoid are good, the car will crank. If it does not crank, try again while jumping the battery to another car. If it cranks, the battery is low or the terminals need to be cleaned and tightened. If you have more questions, please reply.

start solenoid def will it start if you jump it off by placeing the red possitive to the starter cable lug. the solenoid is about 15 dollars.

Assuming you checked fuses and followed wiring for any signs of a short or connector undone. You're getting power to starter, but solenoid sounds dead if you have to bypass it.
If the engine spins but won't fire, I SUSPECT ingition problems. Encountered rain...is seal around ignition unit gone bad? That would splain the plug not firing.
Do you smell gas (oops...petrol) when you crank the motor? fuel getting to cylinder?
Check for water in fuel system.

Hi,
There is a gear mecanism that operates the kick starter.
Atteached to this is a stop lock. This is most likely your nemisis. Chances that the gear has brocken are slim.

Cheers

Jon

Your battery is almost certainly flat.

When you start the engine, the starter motor takes a large bite of power out of the battery. It takes a long time to put that power back.

So, you tried to start with remote start and it did'nt fire up. This took a big bite.
Then you started manually. This took another big bite.

The engine started though, and the alternator began the mamoth task of putting two start attempts worth of power back into the battery.

After 5 minuites, you interupted the alternator and switched off.

Now the battery will be really ill!

You really need to get a jump start from a vehicle with a battery which is about as big as yours.

Connect the leads from the good battery to yours, making sure that the donor vehicle is running. Then walk away and have a coffee. Come back and try your truck again. It should start ok.

If your battery has done this even once, can it be trusted again? If its more than 3 years old, get a new one fitted.

Hope this helps!
M3ODQ

Is the front cylinder firing? put a spark tester on it or pull the plug and ground it to the motor head or something and roll it over and see if it fires. If not then chances are the ignition is bad.