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a search with Google Lens brings up a similar tractor made by MTD and sold by many names. Without a picture of the "variable pulley" it is hard to match it, but this is one pulley shown in a 1994 model. It is sold by different names too in Europe. https://www.ebay.com/itm/285518013224 One can...

we have multiple engine models in this thread. Specifically 1998 Briggs & Stratton engine model 12F702, and 1781F1, code: 98081758. To get correct answers the best thing would be to correctly list the model, submodel, and serial then verify it before hitting post. It should be something like...

Google AI answers as follows Poor maintenance 800 - 1200 hours Average Commercial use - 1500 to 2000 hours Exceptional care maintained like new 3000 - 4500 hours because oem parts usually work the best and even those can be inferior to a part made pre-covid, and the high cost of those parts...

a query online gave multiple causes. Worn bearings in the double stack pulley was most common. It says that pulley and bearing wears fastest because it has two belts tugging at it. If it wobbles or has any tilt that will set up a vibration that tosses the belt. The tensioner idler arm bushing...

if the tank cap is a common size and thread, you might be able to find a universal that sits in the tank. Depends how deep the tank is too. Or carry around a gas can, or strap a second smaller universal tank to it and use a two way valve to use it as a reserve when the main tank runs out...

pete - i put my head to the computer screen hoping it would tell me exactly what "doesn't work right" means, but nothing happened. Do you think you could be a little more specific about what is wrong? A needle is pretty basic. Before you start you slowly turn it in gently counting how many turns...

I tried that approach and it made for a poor reinstallation. Had to do the job twice and the cover is tweaked now. Would have been quicker and easier to just remove the engine.

I have a somewhat similar edger. The cover sits under the engine, so the mount bolts pull the engine down onto the air cover. If yours is like mine, yes.

or the fuel put in it has a problem. A friend one time grabbed the kerosene instead of gas. Spent a whole day trying to figure why he recently restored Packard would not run.

engine noises like a piston or rod seizing typically are thunking or knocking. A squeal is high pitched and would not get out of the case. Most likely it is the starter clutch or something external like it threw a belt and the belt is lodged in a way the pto side can't turn.

did you soak the area in Liquid Wrench or PB Blaster, Knock er Loose, etc., for 24 hours first?

unless you have an engine that has the kill mechanism that is shared with the choke (and some do), it should not as you said, die on all open or all closed but run in between. Some other engines also have a lever that the throttle goes from kill -> choke -> idle -> run.

we have a 20055 that I just overhauled. It was taking 12 primes and two pulls to start cold. Had good compression, etc., just had 20 years of use on it. I cleaned the carb - very simple carb, replaced the o-ring that the carb sits up against, the plastic intake tube, gaskets, and replaced the...

I'd run over to O'Reillys, Napa, Autozone, or maybe your local larger lawn mower shop and buy a new (Probably NGK or Champion RJ19LM) spark plug for that model. Genuine NGK plugs typically have had blue lettering for sometime. The counterfeits have dark gray lettering. Yours has dark gray. You...

scoring is much common on air cooled engines than water cooled. The depth of the scores will depend upon what scored it.

I would make sure that the plug is a genuine one. What happens these days is someone lets a machine like a Mantis sit. It fails to run. They do the easy things first, replace the spark plug, replace or clean the air filter, replace the fuel. It still doesn't run. Then they replace the carb and...

ask yourself how long you will use it on each occasion. Then decide whether to go ev or gas. We have both. The ev does blow more, but the battery and motor will overheat and shut off for safety reasons if we use it more than 4 or 5 minutes on the highest settings. The gas one requires draining...

does the air cleaner have a breather in it that could be spewing lots of blowby, oil or water vapor?

carbon deposits and getting hot.

Don't assume that it is held in by threads and rust, although it probably is because you have already tried an extractor. The shaft and the head may have been the issue, and now that they are gone, with a little PENETRATING oil and not WD40 which is mostly solvent, and a light punch or chisel it...

sometimes people clean the old plug with a wire brush and try to reuse it. Wire brushes will leave some of themselves in the porcelain insulator, and sometimes short out the plug. Use a glass bead blaster, walnut blaster etc., to clean the tip of a spark plug, and avoid hitting the threads. Or...

now you know the problem is that the left side is weak. One of three is missing on that cylinder - air/fuel, spark, or compression.

you said you tried new fuel. Did you drain the tank, and the carb, then try new fuel? If there is old fuel in the bowl, new fuel in the tank doesn't help a lot.

can be the fuel cap is not venting, or the tank outlet is plugged and letting it sit for a few seconds the carb fills back up. It can also be a wire that is killing the spark and the act of shaking the engine when pulling the cord moves the wire that it runs until it shorts out again. It can be...

the voltage a spark plug gapped to .026" fires outside the cylinder in ambient air pressure is usually between 2,500 volts and 3,500 volts. At 125 PSI, the firing voltage needed is between 18,000 volts and 20,000 volts. A spark plug sparking at room pressure does not necessarily fire in the...

yes - what spring? was this one that rotted away, or was it one that was an attempt to solve something else? a cylinder that needs to be choked, or one that is choked and doesn't need it won't run well. I would spray a mist of water, or use an infrared temp gun on both exhausts when it is...

check all the wires for chafing / wearing thru to the frame etc., or mice damage.

thumbs up. Thanks for sharing the outcome.

add up what it might cost to fix it up, then look thru your facebook marketplace to see what is for sale, and why it is being sold. Sometimes people have nothing wrong with their mower but they elect to go electric - and almost give away a good gas mower. Look for an aluminum rear wheel drive...

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read up on it first, and look at some youtubes. It is really easy but also easy to get confused

try another Lowes. Sometimes in retail the manager gets a bonus based on store performance and bottom line. I've seen it where one retail store refuses to warranty something because they don't want to eat the loss.

that would lead me to believe you have a vacuum leak or plugged jet / needle and seat. I have seen on a rare occasion depending on the ignition wiring, a coil work in the start position but fail in the run position. The symptoms are a bit different in that the engine runs until the key is...

you won't know if you can re-use the gaskets until they are off. Sometimes they are pliable and come off cleanly. Sometimes they are hard or they tear. Buy a set before you begin or plan on waiting for them before you can put the covers back on. Then if you can re-use them you will be pleasantly...

AI analysis: Production Details Year of Manufacture: 1994 (Determined by adding 70 to the first two digits of your serial number: 24 + 70 = 94). Day of Manufacture: 157th day of the year (Digits 3, 4, and 5 of the serial number), which corresponds to June 6, 1994. Factory Designation: This...

If #21 was always missing you might ask the person you bought it from if they have seen it lying around.

any place that air can get into the intake system, can affect mixture. That includes blown head gaskets and cracked intake manifolds. Exhausts can get plugged too. Valves can stick open and allow air in that affects mixture. Use a infrared temp gun on the exhaust to see if both sides are...

https://www.ebay.com/itm/178443263545?_skw=7037334&itmmeta=01M15D5FD7WC0DNDBDR0KMS483&hash=item298c0c1e39:g:1M0AAeSww99qj2E8&itmprp=enc%3AAQALAAAAwGfYFPkwiKCW4ZNSs2u11xAPstFZDnhfO5L7i40FrVmMuq1d%2BFMLPdgqFZe1fqG5A2j1zf0YPekj11LltP4dFY9Y%2Bny%2BT%2BFSIUPE0VZ1QyOTQLYUUNanKWYyJvDx6IrJJ5087zXUgwFjBHs...

just relying on the image looks like that is the detent mechanism that holds the shift fork in different positions/gears/whatever that shift fork changes. Beyond that not a clue whether it was there or it got lost while apart. If you can't find it, you'll probably have to call or go see your...

anytime something dies immediately after fuel is added, the problem is usually fuel. Kerosene can empty? Water in the fuel?

Exmark 126-3949 is on fuel tank assembly page. $180 - $225 depending where purchased from. Better make sure a mouse did not chew a wire. Looking at the pictorial, be pretty hard to not see the top and wires coming out of the top of the fuel tank. Also, when these type things go bad it is...

ask yourself why the pushrod broke. Was the governor messed with when the pushrod was replaced.

might want to leave it off for a few seconds after it dies, and measure the coil kill wire to ground to see if it is the coil kill wire killing it, or the load.

there is a huge difference between a well maintained piece of equipment that needs repair, and something that has been allowed to corrode into a solid piece of rust. The issue is labor. If it is your own machine, and you don't mind spending the time as a hobby to get out of the house, it works...

might get an inexpensive oscilloscope and throw it into the circuit to see if they system is producing AC. Charging voltage can be right but a bad diode may be passing AC.

especially on a mower that probably should be at the end of its life and sent to salvage to part out.

send us a link to the carb you bought, or post photos. Lots of times on these replacements you need to figure out where the existing carb idle jet is, then figure out the size, compare it and then redrill the one in the new carb, or if it unscrews, swap it. Very few carbs made today have...

If you meant engine not turning when you tried to crank it, you need to check battery voltage with the ignition in the run position and the headlights on. Fuel supply would have zero to do with not cranking. However if you meant it would not catch when turned, that could be fuel. Make sure...

Tell the client that you really want his business, and to help him so he doesn't feel snubbed, and change the quote to an hourly rate including the time it takes to find parts. Let him spend his time finding the parts. It is not your fault the system is a problem. Document it. Most states...

I looked online out of curiosity after reading this thread from the beginning when it began. The parts diagram shows conventional hoses, clamps and a selector valve etc.. Also one that uses an elbow and a grommet. As for the shop vac, it sounds like you don't have access to a compressor. If...