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@GearHead36 X2

@GearHead36 It's lawn tractors all day for me. They are much easier to work on and small GTs like my husky GT48XLSi with a ✨servicable✨K66 are a Beast on my hills. The hills at my house are so steep, I'll have to upload a pic sometime, but cheap hydros don't last long on my slopes.

See if Jack's small engines or Ereplacement parts has it.

I am getting ready to dig into my old TT K46 from 2004. Funny enough, It is the exact same symptoms: drives good until warm and sluggish up little hills. Replaced fluid and Didn't do crap. On YouTube, Taryl fixes all has a video about fixing a tranny with similar issues. I am going to replace...

@StarTech Me too. Its hard to work with some people.

Hmm, I would say that's unlikely. It doesn't sound like they've had the case opened up.

Or just look up a YouTube video-

I would try adjusting the valves.

Rubber fuel lines? I've hardlined my mowers...😎

What? 😦 I had no idea... I guess I'm just used to the design of the GXV140/60.

Yeah, they really are designed to fail with the internal brake and the brake dust circulating in the oil 🙄. External brakes are better that way.

Just replace it

Are the wires for the safety switch circuits good?

That would be bad rings, or a head gasket

I would say bad rings or head gasket. Does it smoke at all? It might be really faint and hard to see, so you could shine a flashlight next to the exhaust to see it better. Also check that your choke butterfly is open all the way 😉

BUT it is normal, some engines smoke on startup naturally or due to age, etc. All of my riding mowers smoke on startup, but there's nothing wrong with them 🤷🏼‍♂️

Ok, it the gov is adjusted, that's a bad internal governor. Also, what color is the smoke? Blue is burning oil, black means it's running rich and the carb probably needs to be cleaned and adjusted.

That could be a bad Neutral or reverse safety switch

I don't want to start a fight or anything but here's the logic of increasing tariffs. The logic is if we increase tariffs, it costs foreign countries more to sell their crap to us, but also means that manufacturing stuff in China is More expensive, Discouraging big companies from having their...

That's real old! I would say leave it alone and enjoy the good cuttin'.

Welcome to the forum.

If its working great, I personally would leave it. When it starts going a little bit slower or starts Slipping, then change it 👍🏼. If it ain't broke, DON'T "fix" it 🙅🏼‍♂️. I've learned that the hard way lol, my curiosity kills me.😑

We need more information. Changing the fluid could either be beneficial or could reduce the life, but it depends. Age, brand, wear and condition, what do you use it for, etc. Its quite a bit of work for what it's worth.

Could we get some photos of your machine?

Ok, I get that. I guess I'll help ya. Do you have a multimeter? Do you have any electrical experience? If you could find the model number of the mower or/and upload some pics that would be a good start.

Just start a new Thread-

I bet you blew a fuse or blew some part of the electrical system. Not worth fixing IMO. Go get a gas mower, unless you're a tree hugger🙄. My Honda HR215 hit a metal screw-in stake for the dogs and it simply shredded it and tossed it into the bagger like it was nothing! Couple dings on the blade...

Bad fuel pump or sticking choke? Does it have autochoke or anything?

Oh wait I thought the OP was saying when they mulch it cuts fine, but when they bag the grass they get clumps.

Or you need a new high-lift blade.

I say drain the oil because it sounds like gas got into your oil. Replace with some 20W50. That should fix it.

Ohh its one of those, I've got one Just like that. 1. Is the oil overfilled at all? I use some heavier oil because these engines are so old and mine has low compression. How much oil is coming out? It is normal for a mist to come out.

?

Ohh, That's what I was thinking lol 😉

While you're waiting, you can check for a sheared flywheel key. This will cause the coil to spark at the wrong time and won't ever start. You could also put the old coil back on and disconnect the wire coming off it. It might start...

What the heck is a Yazoo-

StarTech: Don't throw parts at it. OP: -Throws parts at it- lol

We need the model and serial number. There are probably 100 different 20HP Koher engines.

I'm surprise no one thought of this, is the fuel pump bad?

If it were me, I would take everything apart down to the piston head to see if somethings got in there, and the piston is crushing it. If not, it could be something loose like the carb I would guess since it's low on power.

Is anything tapping the flywheel? It could be under it.