Sir I'm a retired mechanic of 52 years and just changing parts is not my style if need be.
I drilled the main jet because you can't buy jets from Walbro (I asked them directly).
You can adjust low idle mixture with a micro D tool.
And yes, if I could/can buy rings, I would do so to fix a problem. Oh the trudgery of taking something apart to fix it.
Being that I bought this unit for $40 and fixed it with a quality sparkplug and my time is a small investment to ask $175 on market place.
If it doesn't sell at that price I'll drop it, as I'm still ahead of the game.
I just hope you sell it and move on because it's not worth the time to do the repeated repairs that will be needed on that machine at least not for the amount of hours of you she will get from it.
I too, cannot stand replacing parts and I was not aware because I didn't have a picture of the carburetor that it was a walbro so I did not know it had the adjustment screws. Those are far better carburetors than the newer plastic bodied ones that come on most of the newer 4-cycle Troy-Bilt products that have no fuel mixture adjustment screws at all and they don't really have a jet well I guess they kind of do but it's a little soft metal maybe brass looking but I doubt it's really brass cone like thing.
They are very soft and if you so much just touch them on the inside with anything you will make the hole too big so that's why I recommend people leave them alone.
All you really need to do is blow them out with the plastic straw on the carb cleaner can and compressed air.
So I agree with fixing things instead of just replacing parts and throwing parts at things but there are a lot of people out there who like to mess with things that don't need to be messed with.
I probably shouldn't tell you this but if you run into a situation on one of these cheap machines where you have the cylinder apart and wish to replace a ring... You can get them because there's a guy, at least there used to be on eBay that makes his own and sells them.
You can't get them from Troy-Bilt or MTD just like you can't get certain parts from walbro and it is a waste of time to ever call these companies.
I have this discussion often with people too or more or less my mostly irritated comments after they talk about calling companies and not getting anywhere because I could have told them that in the first place. Lol
So, it's not really that you can't get rings it's that it's just not worth the time to take one apart and put a new ring and something because even if you do get it running perfectly, it probably failed with under 10 or 11 hours of use on it in the first place so there's very little chance of it lasting long term even after you put the time into it to fix it.
It's one of those things like they say in life, pick your battles....
Well with some of this cheap equipment out there especially the handheld things, they aren't a battle worth picking or winning because there is no long-term win - but rather continuing to live with an annoying, problematic, troublesome, not durable, piece of equipment.
I simply call things like I see them and I've seen too many of these to think messing with them is anything more than beating a dead horse.
A better analogy would probably be propping it up on steroids but it's really never going to be a good racer again.
