I do need the igniter for the burnner / my igniter i think it is the wrong one , it is too shot and the spray of oil do not fire/ i think the 'plugs' is little short to ignite on the spray , comes on and off / but i have sparks all times, only dos not get fire , do i need longer plugs !!!do go under the noze of spray!!

Sounds like you need to check the ignition timing. Backfire indicates the spark plugs firing at the wrong time.

These engines have a low oil sensor and if the oil is low, the engine will not have fire. So check the oil level first and make sure it is to the full mark.

Check the spark plug that it still has proper gap .028-.031 in and the proper spark plug BPR6ES (NGK) or W20EPR-U (ND). While you have the spark plug out let's see that it is firing, reattach the plug wire to the spark plug and make sure the spark plug is in contact of a bare metal surface for a ground, the crank the engine over watching for spark in the gap of the spark plug. It would be best to check this in a low light area. Keep in mind that checking for spark this way and there is spark but when the spark plug is installed and there is compression the spark may not jump the gap as it should. If no spark with the plug out check the spark plug wire for cuts or tears and it none seen get a new spark plug. If there is spark with the spark plug out reinstall the spark plug. If the engine hasn't been started for some time drain the gas out of the fuel tank and carburetor. There could be water in the fuel also but to check if there is fire get a can of starting fluid. Drain the carburetor anyway at this point because if there is water in the fuel the next step may not fire the engine because of the water. Take the air filter out and give the opening of the carburetor a short spray of starting fluid. Try to start the engine, if it doesn't start or fire with the starting fluid there is something wrong in the ignition system. The Digital CDI Ignition Coil could be bad but before buying a new one you need to check the shear key of the flywheel to the crankshaft to make sure it is in good shape. You will need to remove the flywheel for this. If the key is in very good shape, then it is the coil.

If the engine fires on the starting fluid then you have water in the fuel or the fuel is not getting into the engine as it should from the carburetor. The carburetor needs to be cleaned.

The three primary things every engine needs is fuel, spark, and compression. For the few minutes it takes I always check compression, then eliminate the rest. A fast way is to attempt to start it with a shot of starting fluid. If it starts, you can assume you have decent spark, and the problem is fuel.
Speaking of fuel, avoid "oxygenated" gas (10% ethanol) LIKE THE PLAGUE. It just doesn't work.Is you spark nice blue clean consistent?
I use an old spark plug attached to a battery clamp, and set the wide (0.40+) If the ignition is strong enough to jump it, it's strong enough to fire under compression. Buy a new spark plug, a couple bucks eliminates that concern.
Air/fuel mixtures don't change much, and wouldn't lead to a starting problem. Get it started and running and then worry about that later.

Try depressing gas pedal halfway. If that helps it start, then check out the engine coolant temp sensor. If the sensor is off or corroded, the computer won't feed enuf gas.

Well, we kinda need a little more info to try and figure it out, but to make it easier, we'll start at the top. Got gas? Oil? Does it crank? If yes, does it have gas? If yes, is it going through the throttle body injector? Don't know? Try removing a spark plug and look at it and see if it is wet, oily, black, crud, You could plug the wire back to it and lay it on a piece of metal on the engine somewhere and have somebody crank it over, to see if it sparks. If yes, then squirt some fuel in the cylinder and put the plug in and see if it fires, OK, then, if it fires, we know the fuel pump is shot. If it doesn't, we need to find out what happened to the coil pack, ignitor, or whatever your car has for ignition system, backing up here, if it doesn't crank, skip all the above and get the battery fixed up, could be old, shot, dirty terminals, some cars had a shut off switch on the fuel pump if it was low on oil, some have a shut off switch if it hits something, gets towed, anything like that. OK, back to the coil pack, test the spark again, make sure you have spark, and clean plugs, new plugs won't hurt, plug wires will mess up an engine every time, Check it out, hope this helps somewhat.

Check for low oil level. If level is OK, check low oil level sensor. Disconnect the wire to test.

More likly you have a dirty filter. Or a plug in a line. Test this by jumping your pressure switch. You can also check thr roll out switch the wire that rung along the fire wall just above the burners. It will have a black cover about two inches long on it that has a switch that is cased in wax if the fire rolls out the front of the cabnet the wax melts and shuts the heater down. Check this by jumping also. I hope this helps.

Oil on the plug is an oil problem. it means that either you tipped the mower and oil ran into the cylinder, or you put too much oil in it and it's leaking into the cylinder. Check the engine oil level, empty some if it's over the level it's supposed to be. You'll want to clean the cylinder, and here's how to do it. Get a can of starting fluid. Take the spark plug out, and remove it from the wire, spray a good 5 second shot of fluid in the cylinder, and pull the rope several hard pulls. This will shoot the fluid and oil out the spark plug hole, and the starting fluid will evaporate within a couple of minutes. Spray the firing end of the plug with starting fluid to clean, shake it out, blow on it to get the extra out, and let it dry(should take about a minute.) Pull the rope another round, and then put it back together. It should run fine after that. It'll probably smoke a decent amount at first, but it will go away within a few minutes.

It could be an intake leak. Spray some water around the intake boots ( making sure you arent spraying it into the carb throat) and around the heads while the motor is idling. If the RPM drops with the spray of water you have an intake leak and where you are spraying the water with effect will help you identify what is leaking.

go an buythe tranny for it an put it on or pay someone to do it