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Bought some muratic acid, it's taking quite a bit of effort with a soft metal pad to take it off.

https://ibb.co/dBGfyXw https://ibb.co/5rt2X0D Is there a way to take the metal off the crank. This is from the top counter weight. Left alot of metal almost welded together

https://www.ebay.com/itm/153768425198 you think this would be cheaper option?

Yeah it's been take off. But there's still metal left from it

Ok so i started taking a look at it again. I noticed that there was no ring on the top counter weight and it was stuck in the crank. I managed to get it off but there's metal still stuck on there. Do you believe this is the problem? And is the crank done? https://ibb.co/Jty857X...

The shaft seems to be in pretty good condition. Should I just order a new piston rod and start putting things back together. Also do I have to lube the shaft up and how do I re-time it.

Not that I can tell

https://ibb.co/9wqprYk https://ibb.co/XVKsr9z https://ibb.co/QmGTGmP https://ibb.co/RbJLTmR https://ibb.co/fdxZVzZ Worth mentioning that the piston connecting rod is cracked and both sides. I took a picture of the crank, is this where I should be checking for deep groves, where the connecting...

Could you send me an example of a rod and cap bearing

Never mind. Everything is out. https://ibb.co/d0wHTPT https://ibb.co/J5jg1Ps

I've taken the top con weight out. And the piston completely out. Just can't get things pulley off.

I can't get the pulley off. No matter which way I turn the bolt it just spins but won't loosen

https://ibb.co/mRpyRws Ok what should I be looking for next?

https://ibb.co/gy9Gg3W Can't take it out, I tried unbolting from the bottom of the pulley and no matter which way I turn it won't loosen up.

Not sure if it's seized. I can wiggle the rod side to side

Any ideas Bert's?

https://ibb.co/jgmVL8P Piston rod seems to be cracked

https://ibb.co/XZh2YQG Looks like it's intact

Seems like that ring is broken. Nearest to the spark plug hole, right under the cam. Is it a worthy/no expensive fix? https://ibb.co/sVJNYR7

Sorry I'm a little confused. So should I Mark a spot on the cams and begin taking it apart?

https://ibb.co/Xjckszh Ya the bottom counter weight is there. https://ibb.co/Xjckszh

Looks like it does get held in from the cover. https://ibb.co/XZh2YQG

Around 8:40 of this video it shows the weight of the counter balance that's on the bottom. I'll drain the rest of the oil and see if there's one on the bottom.

https://www.ereplacementparts.com/kohler-sv5900017-engine-parts-c-106503_288368_288812.html Page C looks like it. Any thoughts?

https://ibb.co/BwzZRVn I could swing it left and right. But I don't see where it's supposed to be attached to a connecting rod.

First off, I appreciate all the help and effort. Very kind of you and everyone on this forum. So alls I have to do is take apart the counter weight and get a new one?

The back part near the steering wheel is stopping me from turning it so I can align the dots.

Well that doesn't look too great. What should I do from here. https://ibb.co/XbY97ZZ https://ibb.co/Wfg0FrF

Ok this is how far I've gotten. What am I looking at next? https://ibb.co/qk4vy3G

Yes I have. Even with the plug removed it takes a decent amount of force to move it with both hands.

Ok I've never taken a mower engine apart, yet a engine this big. But I'm more than willing to do it. So I'd need a strap wrench to begin with for the flywheel?

Engine model # SV590S I checked all the connections and made sure everything was okay. Still nothing. I can't spin the flywheel very easy. Takes 2 hands with alot of effort and that's without the spark plug.

Picked up a riding mower for cheap(my first one). Thought I'd make a project out of it. Bought a new battery. All's I heard was a click from the starter. Went back and fourth, got another new battery, the solenoid checked out. Realized it's a flywheel that's not moving. I can move it with a...