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Check the transmission to chassis bolts. There have been a lot of them come loose in recent years. The manual assembly labor workforce that care about their actual work is getting less all the time. You can never pay a lazy person who is well fed enough money, they just want more to do less work.

We need the product label information off of the label under the seat. There may be bushings on the center front yoke that need to be replaced as well.

Hello T., Posting multiple times for the same machine and issue is annoying because it creates clutter. Many folks will simply avoid your postings. Post one machine and problems at a time and edit as needed in the same posting. Remember we are trying to help people and doing it for free when...

Hello C., Glad you got it figured out. This is the way many things get resolved if you have the determination to see a problem through to a solution. I've been a technician for 40+ years, and I still call on fellow techs when I get stumped.

While you are that far into this, make sure the fuel tank is clean and the screen in the bottom (inside) is not gummed up and blocking the fuel flow. Modern fuel tends to gum up when it ages due to all of the refinery additives.

Hello C., (More thoughts) From my automotive training many years ago, one thing that has stuck with me is the ideal fuel to air ratio number of 14.7 parts air to 1 part fuel. If enough air cannot get in the fuel bowl as the engine is demanding the fuel, a cavitation effect can take place. The...

Hello C., "Nothing ventured nothing gained" is a saying that seems to fit when no one can provide a direct answer. I suspect many people have either lived with the running issue or gave up. Aftermarket carburetors are a luck of the draw, and many have gotten better over the years, but they are...

A manually adjustable automotive style inline fuel pressure regulator placed between the carburetor and the fuel pump would resolve this issue. As Star Tech indicated, these carburetors only require a very low PSI fuel pump to operated. A typical parts store automotive electric pump produces...

Never seen Honda Bond turn black before. I'm talking about the white version Honda has used on their engines for many years. The next sealant suggestion is Permatex #2 in the tube, it takes a little bit of time to fully cure but it works great. From there I use Permatex Ultra Gray and give it...

Use Honda Bond sealant and you will never have another oil leak. Of course, it will be hell to ever get apart later if needed.

I'm referring to only one cylinder head at a time. There are two valves in each head. Only adjust the valve lash on one head at a time. Teryll Fixes all has a good example of adjusting the valve lash in one of his videos.

https://www.partstree.com/models/xt1-lt-50-13aqa1cq056-cub-cadet-50-xt1-enduro-lawn-tractor-2016/hydro-drive-19/

I don't know if it is possible, but you might consider changing the main jet over from the original carburetor to the aftermarket one and see if that helps.

I think you are pushing the design limitations of the transmission and possibly the drive belt is also slipping a little from a weak tension spring.

Do you understand that these aftermarket carburetors are not a direct replacement, they are made to fit multiple applications? The B&S opposed twin engine was used on all kinds of different equipment applications. The two bowl vents drilled in the top of the carburetor cover are so a variety...

Are you sure the new switch has the same letter ID at the pins and the old one that was on the machine? I've seen wrong switches before. They often look the same on the outside but are different internally. If this model has a fuel anti-backfire solenoid, check the wiring for it carefully, then...

Hello C., What does to top of the original carburetor, where the air cleaner mounts look like? The 3 larger holes on top are threaded to mount the air cleaner base. The small hole is just a fuel bowl vent. That hole should always be open and line up with the top of the carburetor vent. From...

I've dealt with quite a few this year that had debris sticking in the fuel pickup tubes and fuel lines. The pickup tubes & lines had to be blown clear with shop air or replaced. Grass clippings, dust and/or debris/water from a dirty fuel can often takes years to build up in a fuel tank and then...

The harness has to be removed from the engine and the diodes uncovered/exposed to test each with an Ohm meter. When people (DIY and mechanics both) do not understand diodes and testing with a meter, that's when problems happen. I know many self-proclaimed "small engine mechanics" who know...

Hello F., Can you provide the information that is etched/engraved into the flat side of the engine block? It will be on the side opposite of the carburetor and fuel tank. The number you provided is for a Toro Recycler mower chassis; the engine is made by Briggs and Stratton.

Part tree: https://www.partstree.com/models/613777-0116-j1-briggs-stratton-vertical-engine/control-brackets-springs-links-mufflers-5/ You will need the service manual information to show part fitment.

Welcome newbie, Can you provide the product label information off of the machine and the label information off of the engine? I do not like guessing and searching the internet for hours. Is this a Gravely with a Mountfield engine? Is this a V-twin engine and possibly one cylinder is not...

If you buy B&S only for parts like this, you are paying for the marketing and packaging. All of the electrical components are purchased from outside suppliers and put in B&S packaging. I have used mostly eBay parts for many years as long as I could find them on there. Another good source is...

This reads like many of the automotive diagnostic code flow charts that I have worked with for years. Many of the fuel injected ATVs and side by side vehicles are similar except they of refer you to use their manufacturers specified specialty scanners.

Hello M., Ethanol comes from cheap commodity crops that are easy to refine. They thin the real gasoline and pocket the profits. The phrase "Buy low and sell high" come to mind here.

I've seen many wasted parts thrown at equipment because of these inline diodes hiding in the harness. Not every manufacturer uses them and some only use them on certain models.

Inline diodes are like an electrical "check valve". They are made to allow current to only flow one way. The problem begins slowly with age, vibration and heat. The diodes will develop stress cracks and begin to leak current the wrong way. This is where ignition coils start feeding back on each...

I have been a mechanic, technician and instructor for most of my career, and I cannot begin to tell you how many times equipment has lied when testing. In my career, I've probably thrown away more testers than most people have ever owned due to false results that sent me in circles. When it...

I recommend you download the Kohler manual for you engine if possible. Some of the manuals for the fuel injection system have been restricted to dealer only, but hopefully that will be changing soon under the right to repair legislation

Hello B., It is an interesting concept but not practical or realistic. Stick with the steel blades. A tractor driven rotary finish cutter has way too much torque for string trimmer line. Even if you could find a way to adapt a string trimmer line adapter to each spindle, you would be stopping...

That appear to me a metal fatigue break issue. These parts are built too light for the environment and stress they work in. I recommend you have the old one welded and keep it for a spare.

That is the usual setting. I try to set both at .005 inch. Adjust the clearance for each valve with the opposite one fully open.

It helps us help you when you provide the product information label information off of the machine. Make sure the mounting bolts for the transmission to the chassis are tight on the left side drive unit. Are the operator handles even with each other?

Sounds like it needs the valves adjusted.

Hello C., That play is a result of age and wear. When new they have a snug fit on the splines. A new disc would fit better, but I don't see the importance or need for a new one. The brake is not utilized that much except for hold the machine when parked and the clutch/brake pedal is locked...

Thanks, I was just curious.

It is possible, but likely off of a body panel somewhere.

Drop box wants a person to sign up and I'm not down with that. As for the brake, tighten the center nut on the apply bracket a quarter of a turn at a time and see how the brakes act. The stopping brake and park brake are the same mechanism on most of these. The pedal lock is what holds the...

How is it considered "beyond repair". Did it throw a connecting rod through the engine block?

Try eBay. They show several used Kohler 23hp engines. I suggest going with a Kohler Command instead of a Kohler Courage if given a choice. The crankshaft dimensions is the most important factor, and they should be the same.

Looks like a piece of automotive style edging trim called "edge welting". This stuff was used to cover welded panel edges on many older vehicles. It was also use in some machine applications to prevent people from being cut on metal edges from welded seams.

Hello G., Many people understand what happens inside the engine cylinder above the piston but never think of what happens below the piston inside the crankcase. Without a crankcase breather system, the displaced air inside the crankcase would build pressure and force air and oil out of every...

Hello G., It's the world's petroleum manufacturer's thinning out the gasoline fuel mix to make more profit per liter/gallon. Ethanol blended fuel has never been good for anything with an aluminum carburetor or regular steel fuel lines, because it attracts moisture from the air. This moisture...

We need the model and spec number off of the engine. to better understand what carburetor and air cleaner you are dealing with.

If the valves appear to be opening about the same and it is cranking good, the camshaft is likely okay. I mentioned it because I've had them wear the lobes down before.

When you adjusted the valves did you notice if the exhaust valves were not opening as much as the intake valves? Late or lazy exhaust valve opening is a sign of a worn camshaft. Late exhaust valve opening will also contribute to the initial problem you described of popping back in the intake...

I'm not questioning you personally, I'm questioning the compression gauge.

I think the "140psi" on both cylinders number is fictitious or the gauge is broken. Was this cranking psi? The starter does not spin fast enough for that reading even with the throttle wide open.

A drop of red Loctite on cleaned bolt threads will help keep them from loosening. If they keep coming loose the main block will develop a stress crack and that would not be good.

The fuse holder is usually in machine harness and not on the engine. Here is a diagram of a similar model I found online through parts tree. Item 33 show to be a circuit breaker instead of a fuse. Circuit breaker on models like this do get rusty inside and act up with age. You can try jumping...