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https://www.foxnews.com/tech/robot-mower-flaw-could-open-home-network

did you check all the cooling tin to be sure it is not plugged with a rodent nest, so mch that it is overheating? Did you check the exhaust and spark screen if it has one to be sure they are not plugged so much that exhaust pressure builds up and pushes oil out thru the breather due to excessive...

you never wire brush the tip of spark plugs. The ceramic will pick up metal off the wire brush and short out the plugs. Now you need new plugs. Do not buy them online because of all the counterfeits. Get them from a local place like NAPA or your local mower shop. No torch brand. Run some HEET...

I think Honda pulled out of the small mower market in 2024. Might find Toro parts and service easier to come by. I would keep both for a season and see which one I liked the most.

inverse square law applies. The magnetic force at .015" is only twenty-five percent that of .0075" The magnetic field strengh is inversely proportional to the square of the distance from the source. At double the distance the field has to disburse over 4 times the area so it is only 1/4 the...

sounds like you solved it

what does the manual say is needed?

also see https://lawnmowerforum.com/threads/no-spark.81114/

without more information it is hard to answer. Maybe others might know what engine you have but my guess is most would not. Is it one cylinder, two cylinder, overhead valve, L-head. How does the throttle work, is it one speed fits all or a variable throttle? Four stroke or two stroke? Belt...

post the brand mower, model and serial number to see if someone can find a schematic for it. Just wiring things together hoping to find the magic combination may result in permanent damage to your mower.

I'd look closer to see for sure where it is coming from. More than once I have read or have seen someone with a mouse nest smoking. Another long shot would be a broken crankcase breather dumping oil fumes out. If so then I would be concerned about the quality of the oil.

sounds like you have both a problem with crankcase pressure and a problem with intake leakage or a lean fuel delivery. You'll need to do a leakdown test to find where the excess pressure is coming from. You might also want to look at the hoses off the crankcase to the air cleaner to see if one...

Something in the choke mechanism is on the fritz or there is an intake manifold leak. Probably needs valve clearances checked too as Slomo suggested.

I looked at the parts diagram and a blow up of the major carb parts kit MTD 951-12779. It does not have a seat in it so most likely the seat is not replaceable. I would use something soft like a q-tip to clean it, or if that is too wide, a soft match stick or a small soft brush and blow it out...

hit by a parts cannon misfire, eh?

glad you got it out. There was a chance that the bolt would not seat or worse. Put grease on that seal and clean it will before putting the pulley on or the rust and grit will eat the seal.

before replacing a coil I would check its grounding, and for rodent damage around it. Also be cautious if the spark plugs were sourced online thru some of the discount sites. Lots of counterfeit plugs around that look very much like the originals. Those do act up and cause intermittent dropout.

depends on the seat. Some have a small plastic or rubber seat that a tool extracts and replaces them. Most mower carbs etc., use either a non-replaceable seat or one of those. Autos from pre FI used to have the brass seats that unscrewed like a main jet. Seats are on/off. Main jets depend on...

put the correct amount of fuel dryer in the tank and see if it improves. Sounds like either debris in the tank blocking the outlet, or a little water in the fuel.

5 psi is a lot for any carb. Yes they will hold but it is still a lot. We used to set the psi to 2 -3 psi on our racing cars. I would use magnification to check the needle. If the seat was replaced, was the correct tool used?

white or gray? White smoke is moisture. Gray is oil. Does this engine have a radiator and water cooling system? If so I would check the cylinders with a bore scope as soon as possible to see if there is evidence of moisture in the cylinder. Water in a cylinder could hydrolock an engine, bend a...

According to Google AI

Since it is not electrical, I see no reason why not but just a tiny bit because it can dry and get gummy. Maybe a tiny touch of silicone grease would work better. If there is dirt etc., in the housing, maybe a small bristle brush and some brake cleaner might clean it out. If you think that might...

usually the choke is only needed on an engine to start it. Once an engine is running properly, the choke can be disengaged within 10 seconds to a minute depending on the engine.

Maybe ask google? 1st suggestion when I asked was a series of videos how to remove it. Apparently they are often stuck in but with the right technique will come out.

fuel toair compression spark If spark is missing on that side, need to figure out why. People will want to know the exact engine model, and serial number to assist beyond that.

I would clean the grounds on the old coil, and verify it has a good ground. Don't overtighten those bolts. Sometimes rust and corrosion can cause the ground side of the coil to fail. It grounds where it touches the engine, and thru the bolts.

if these are plugs that came from an online source, you may have a whole run that are counterfeit or defective.

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most of the small engines are calling for synthetic these days in a 10W-30 where the climate can be 40F in the morning and 95F during the day, or SAE30 if the temperatures are more moderate. I recently went thru the same question myself. Do not use non-detergent oils in an engine that produces...

It is called a "Pulsa Jet" carb by Briggs and Stratton. Lots of articles and maybe 30 videos on them. Here are a couple examples. When rebuilding, lay a known flat straight edge on the tank mounting area and verify it is not warped from the mounting fasteners being over-tightened, If it is, it...

all depends on whether the mooring lines were let loose first.......

Google the bushing part number and it will come up. Also goes by BS50, BS60, BS600. The valve said use another part number at one site and when I googled it, this came up. https://www.ebay.com/itm/296303498282 No idea if it will fit. That said, go to James Condon's webpage and send him a...

yes - those flaps have to properly seal. One acts as an inlet and the other an outlet. when the outlet seals, the inlet allows fuel into the cavity. Then as the diaphragm pumps, the inlet seals and the outlet opens. When they deform, the fuel just swishes back and forth. Sometimes if there is...

What other have said^^^ People here have on occasion posted that some alternator systems need a near fully charged battery to work correctly. Charge the battery again, and then check the voltage on it before starting the mower. Check it again with it running to see if it is higher or lower...

That is the best way, you will get closer than anything canned, if you want something nice

spark at the right time fuel to air mixture compression One or more are missing.

you asked. Most hardware stores will have it. If you want something closer you either go to JD and pray they sell you something that matches, or take a part to a local autobody paint supply and ask them to match it. The latter is the best solution because not all batches of paint will be the...

also - that style carb is prone to the fuel tank base warping. That causes some issues.

John Deere green and yellow

I had a mantis, and a leaf blower that used the same design carb. Inside there was a diaphragm that looked quite good. However it had little flaps as part of it, and over time those small flaps would deform. Those flaps act as a valve that controls fuel flow off the main diaphragm. As they start...

loosen the fuel tank cap. if it dies after that, spray a small squirt of Berryman's B12 into the carb throat and see if it runs. Report back.

compare the part numbers on your SPECIFIC model and serial number is what I would try first. Many sites have parts lists. If you don't know the part number of a specic hood for sale, ask the seller the model and serial of the mower it is coming off of.

did Google turn anything up when you searched?

again, if the bolts are thru bolts, with a nut on one side and a bolt on the other, use nylocks. If the bolts thread into the case, clean the threads out with some Berrymans B12 or something, and use blue loctite. Avoid cheap imitation brands. If the threads are stripped, put in heli-coils. Red...

I could not find anything definitive using those numbers. My first question, regardless, would be to verify that the throttle shaft is closing all the way to the screw stop at idle. Then if it is not, why. If it is, with the engine off I would shine a light into the venturi and look to see how...

use nylock nuts (and lock washers if you want. Any hardware store should have a package of them. I often change the cheap grade 3 bolts and washers that come with units to grade 5 or Metric 10.8 and nylock nuts to prevent what you are experiencing. Usually even without them they will stay tight...

I would have him research "mower salvage yards" and see if anything is near him. Ebay is another place he can keep an eye on. Maybe FB Marketplace. He should figure out what other mowers share a common deck. As an example, say AYP made it, then there might be multiple mowers that had that same...

are they heating up just sitting, or only when it is running?

Are they bolts, lock washers and nuts, or do the bolts thread into the crankcase/bellhousing? If they are bolts and nuts, I would replace them with new ones and nylock nuts. If they go into the crankcase, even with blue Loctite, they may come loose, especially if the threads are failing. Is...