17.5 hp 42 in. Deck Lawn Tractor – CA Model

Not getting fire to sparkplug. Ran it last night and then went to restart and nothing…Model #917.272670 17.5 HP 42″ craftsman. put in new spark plug and still nothing. Could it be loose or bad wire or fuse??
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First does it turn over at all. if then check to see if the blades are turned off, out of reverse seat interlock ect.

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If the plug is clean or you`ve replaced it and the mower still won`t start, the issue could be a lack of fuel. Either the carburetor is dirty and not able to mist the fuel to be mixed with incoming air, or no gas is getting to it to begin with.
If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
Common causes include a dirty air filter, spark plug, and carburetor. To fix these issues, replace the fuel filter, clean the carburetor and spark plug, and replace the fuel if it is old as illustrated below.
Check to see if the switch and terminals are free from rust and replace any damaged or broken spark plugs wires as necessary. Alternatively, it could be a bad ignition module. A simple way of testing the ignition module is to leave the car idling for 30 minutes and then tap the ignition module with a screwdriver.
Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas. If this doesn`t work, you might need a new fuel filter.
In older vehicles, the ignition control module is a separate computer system that controls the firing of the spark plugs. In modern vehicles, this process is controlled by the engine control module, a different computer, instead.
When the high voltage produced by the ignition system is applied between the center electrode and ground electrode of the spark plug, the insulation between the electrodes breaks down, current flows in the discharge phenomenon, and an electrical spark is generated.
Incorrect timing is the most overlooked and misdiagnosed cause of a no-start. Perhaps you automatically think of ignition timing as the position of the crankshaft when the No. 1 plug fires. While this is important, it isn`t the only timing condition that can influence a no-start.
Using the wrong spark plug in a car can have several negative consequences. Firstly, the engine may not start or may run poorly. This is because different types of spark plugs have different heat ranges and electrode gaps, which affect their ability to ignite the fuel-air mixture in the engine.
Your lawn mower turning over but not starting due to several reasons, such as a faulty or disconnected plug, a disconnected spark plug wire, a clogged air filter, or a contaminated fuel tank. A faulty carburetor, a dirty cutting deck, or a dysfunctional flywheel brake can also cause this.
Disconnected, dirty or fouled spark plugs are common causes for engines that won`t start. For small engines, spark plugs typically need to be replaced every season or after 25 hours of use. You should also check to make sure the spark plug gap is set correctly.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Spark plug firing order – Farmall Tractor C ,super Av, Complete Gasket Set
ANSWER : Firing order for 96 lincoln mark 8, 4.6 liter

The engine fires, runs for 5-10 seconds and then dies. If I reprime it, it will repeat the same way over and over.
ANSWER : There is a number of different problems that could account for this.you may need to replace a clogged fuel filter, also check to see if the air filter is clean… there is also the possibility that you may need to put in a new carb kit.You may also want to check and make sure that the choke is not sticking.good luck

Riding mower keeps back firing and will not start
ANSWER : You have a sheared timing key it is under thefly wheel replace says the red neck

I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?

I have a older snowblower that will not stay running. I put a new spark plug new gas and a new fuel line. It has spark and will fire for a few seconds after i spray starting fluid in it and put the plug back in. what should i do next?
ANSWER : Adjust carb screw its to rich

Purchased new 09
won’t start after new fuel, carb cleaned
don’t think spark plug bad
ANSWER : Squirt a little gas in the carb, get a new plug in there, see if it will fire, make sure the blade is on, won’t run without it. If it won’t fire, squirt some gas in the piston itself and try it again. Narrow down the problem. Only so many things will make it not run. Any kill switches, safety switches on it? Check it out.

Honda UMK435T wont start but there is spark and thr carb seems to get fuel.
ANSWER : Change the spark plug and pull the cord a few times before putting it in. to get the gas out of the head. if it is getting fuel and fire. you might check the compression to see if something is wrong internally.

My mower is getting fire and gas but all it will do when you pull is back fire (pop) but it wont seem to start
ANSWER : Sounds like the fly wheel key is sheared making the engine out of time. Check and make sure you dont have a bent blade too, When the blade hits something the key will shear off so it doesnt damage other things but the blade may be bent as well