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Now it's perfectly clear!!

The manual on the mower is at: https://www.lt2000manual.com/ Have you replaced the fuel filter? Page 28 lists reasons why the mower may not start. I'd start checking all of those.

I presume you took care to set the clearance to the coil carefully. Unfortunately, I can't think of much else there is to this simple electrical system. You've disconnected the grounding wires, replaced the coil and spark plug and the symptoms haven't changed. The only other thing is the...

I went through all these exertions with a Briggs Quantum engine. It too would start if fuel was squirted in the carburetor and quit after that was consumed. I eventually found that the plastic fuel manifold was cracked, which prevented the fuel/air mixture from being sucked in from the...

Also, I'd consider the possibility that something else entirely is the problem. Have you checked that the engine is getting fuel by adding some directly into the fuel manifold, checked for good engine compression and checked for good air supply to the carburetor and such?

How did you test for spark? Have you tried replacing the spark plugs?

Why guess? Measure the voltage on both sides of the switch and find out for sure! Then you can jumper out the switch and see if it starts normally. If it does, I'd say you have confirmed the problem, at least as far as I can imagine.

Just guessing, but you could pull out all or several flywheels that are possible candidates and compare them for differences. If you put each in it's own similar category, that might make it simpler to compare your old flywheel with a replacement that is the same.

Hmmmm! As I continue to think about this, I'm guessing that you could simply remove the spark plug and see if that caused the engine to crank normally. If it does, it would lend support to the suggestion that you have an engine problem. If the engine continues to labor with the spark plug...

Well. I would consider it a big job and requiring possessing or developing significant skills. I have viewed some of those videos of doing this kind of thing, and regard them as a cautionary tale I would prefer to avoid, myself. If I decided to do it, I might find an old mower to take apart...

How 'bout checking the voltage at the starter motor and observe what happens when it cranks? If it drops way down, you might have a poor electrical connection, bad solenoid or other issue.

Oil tends to drain down and plug up the air filter and the engine wont run until the mess is cleaned up. I learned this the hard way once.

No. This part was the intake manifold that conducted fuel/air mixture from the carburetor to the engine valve. Because it was broken/cracked, the vacuum developed by the piston sucked in air from the crack rather than atomized fuel/air mixture from the exit of the carburetor. So---- no leak...

I once did a furnace repair for a customer whose power had been off for a week. As I walked up to the house, I could hear the Generator making generator noises. Before I left I asked the guy if the neighbor had complained about the noise 24/7. He said..... "No. I told my neighbor that if...

Watch this video for additional ideas on things to check and methods of checking.

Here is a good You Tube video on diagnosing engine surging problems.

I just broke off one of three mounting bolts on a mower I was removing the engine. The other mower had all three bolts come off without breaking the bolts. I guess brute force is not to be recommended.

<< Was your plastic part cracked? Was it simply blocking the mixture flow or redirecting it somewhere? I am assuming you replaced the part? Do you happen to have a URL for a replacement? Or just the name? Thx >> This plastic part, which the rubber o ring fits over, was cracked/broken all the...

<< The mower is fine when cold but once it gets up to temp especially lately as the weather is warmer, as soon as you release the clutch and load is put on the engine it cuts out. >> Has anyone tried connecting up a problem engine like the to an oscilloscope? An osciloscope makes a graph of...

Removing the blade adapter is likely to be difficult and require a two jaw puller to get it off. If you search You Tube for "removing blade adapter" there are numerous videos on how to perform this trick.

I recently had the same engine that wouldn't start. Very likely the problem was that the engine wasn't getting fuel. So I tried cleaning the carb ---several times, then replacing the carb. Replacing the rubber fuel line ---washing out the fuel tank with gasoline to be sure there was no...

<<Scrub it down with the ex-wife's tooth brush. >> Best reason I've heard yet for getting married.

<<Does it blow out any black smoke when it chokes out? >> Doesn't that imply that it's being periodically flooded with fuel to cause that problem? Just guessing, but if the fuel pump was increasing fuel line pressure periodically perhaps that might cause this kind of problem. Perhaps the...

I'm no Xpert, so I'm just thinking through possible causes for this kind of issue. Sounds to me like the equipment is running lean due to some kind of defect. That would explain why you always needed some choke to get it to work, and if the original problem has been getting worse over time...

I'm AMAZED you guys can get so much work out of a wench.

I did tear into the engine and something was broken off inside. I couldn't get the blade adapter off ----they are always too tough for me. At this point I'm supposing that I'll swap another B&S engine into that Snapper mower.

The blade will make only a part of a revolution either direction before coming to a stop. Darn! After putting a lot of time and effort into repairing that "wont run" problem, I really wish I had a chance to admire my effort before something else failed. I suppose I'll tear into the engine to...

I'm starting a new thread to report the problem I identified that was causing the B&S Quantum engine to not run. I pursued a variety of bad fuel-dirty carb solutions, none of which helped a bit. Someone suggested checking the spark and opening the head to verify that the valves were working...

<< have you watched the fuel solenoid function with the key before reassembling it? if its not puilling itself down when the key is on no gas will be sucked up through the carb you can take it off and make sure its working correctly without removing the carb, just be sure to shut off the fuel...

Another method I used to identify difficult or intermittent problems was to cycle through the problem repeatedly ----many times perhaps, until I could identify or eliminate possible problems. In the case of this mower, perhaps you could tilt the mower through a 30 degree slope repeatedly to...

Interesting explanation! As a professional furnace repairman, one of the major advantages I had over DIYers was the ability to cast an eye over a malfunctioning piece of eq

Interesting explanation! As a professional furnace repairman, one of the major advantages I had over DIYers was the ability to cast an eye over a malfunctioning piece of equipment and observe subtle problems that might not be at all obvious to the DIYer. Of course now that I'm a DIYer...

<<I have eliminated the use of all fuel treatments for storage about 6 years ago. I now keep a 2 gallon fuel can full in the shed and every 4-5 weeks I dump it into the truck and refill the can. This way I always have fresh fuel available. >> I do that too. At the end of the month I dump any...

<<So you spent 14 sam-witches on a Chinamart carb. >> WRONG! They were so cheap I got TWO, so I'd have a spare! Today I ordered a gen-u-ine B&S carb. I've replaced the fuel line and washed out the fuel tank repeatedly until no more crud came out. We DIYers CAN learn, if we do the job over...

Frustrating, isn't it? I'm having similar issues with a Briggs and Stratton fuel system that I'm trying to get working properly. Sounds like you might be back in business with a new fuel filter, or at least you can compare how freely the fuel flows with a new filter. I'm getting to be a...

Thanks for the report! I have some fuel tanks sitting around, I'll have to examine them closely for filters and perhaps cut into them to see what they look like and check out any debris that's collected on them. While my fuel tank was out, I sloshed gasoline around in it until there was no...

I didn't know that! I just had the fuel tank out to clean, and I've never noticed a filter in a fuel tank. What should I look for in the future? What is the likelihood of such a filter getting plugged up or otherwise causing problems?

Still waiting for that reply....

I found a fuel filter in the fuel line between the fuel tank of my Snapper walk behind mower and the B&S carburetor. What are the advantages and disadvantages of such a fuel filter? Is it worth while installing a simple filter if the mower doesn't have one? How likely is it that a filter will...

Thanks for your comments. The fuel line had a filter in it, but I've supposed that a partially plugged filter might impair fuel flow, and in any case the fuel line was old. so I replaced it. I then inspected the fuel tank, which I found to be contaminated with crud. I removed the fuel...

I do the same.

I was an experienced gas furnace/appliance repairman before I retired. After that, I contributed to various internet forums to try to help people get their equipment working. There were often others of varying expertise who made contributions as well. Sometimes we could hit the nail right on...

I'm currently experiencing the problem you describe with a similar engine and the same carburetor. I replaced the carburetor with a $14 Chinese knockoff, and the same problem continues. If I prime the engine, it starts fine but then quits running after a few seconds. Sounds like no fuel to...