That matches what I found on CC's parts site. going to grab it. Thank you a ton!

That one looks right. I didn't double check the part number, but I'm pretty sure it is the right one. If you looked it up, I'm sure it is.

Ok So I dug into the Carb last night. Its pretty rough, I debated a replacement... but I have a few questions before I buy something.

This is a Carter model N #20... I dont see many available online, and it seems like most of the O's had #26's if I understand the few threads I found correctly.

Im posting pics below. Issues I found so far:
The Throttle is loose (up and down and side to side) and it looks like the top of the rod holding it in is all boogered up.

Adjustment screw and spring are rusted and pretty weak on the top of the carb.

I need new gaskets for the fuel bowl and for the carb where it meets the motor. They are both in pretty rough shape.

So should I buy a replacement? Does it have to be a #20 or will other stuff fit?

More Pictures of carb

Look for a carb for a Kohler K161 or K181. Most are not listed as #20. The #26 will not fit the K161 that you have there as the mounting bolts are further apart since the throat diameter is larger. There are tons of K161 and K181 carbs listed on eBay and the sponsors at the top of the page have the carb and gaskets you need.

You can get a Chinese clone carb very cheap. Even if you don't like the idea, it will get you closer to up and running and you can worry about repaining you old carb later.

https://www.ebay.com/sch/sis.html?_n...72.m2749.l2658

Like Stephen said, the #20 is the only size that will fit your engine, but but the Carter is not the only model. Kohler had a carb that looked just like the Carter. I suggest rebuilding what you have. Parts are not hard to get for them. You can get them from CCC, Kohler, or any aftermarket. Ebay has kits. There is a guy I buy a lot of stuff from on ebay. Here is his store. I took you right to the Kohler parts. If you are going to buy on ebay, check with him first. I also buy Prime Line parts from my local O'Reilly's. Prices aren't bad, but they usually have to order the stuff in. I wouldn't worry too much about the springs. They are just there to keep the screw from changing position. As long as they put a little tension on the needle, they are doing they job. If one is broke, or junk. Take a trip to your local hardware store and find a spring similar. Cut it to fit if necessary.

If you can't get it fixed, yes, you can buy a new Chinese knock off carb on ebay. They seem to doing fine, as a lot of guys on here have bought them. Don't buy the cheapest one... and when you get it, you might drop the bowl off and check it out. Some guys have reported finding issues inside when they have checked them before install.

When looking up parts, look here:
https://www.cubcadet.com/webapp/wcs/...101&langId=-1#

Go down to the bottom and choose "Find Parts By Model". Choose "Garden Tractor", then your model is at the bottom of the next list, and the model is "Cub Cadet". Then choose the sub assembly you want to look at. Part for the O are, especially the engine, ARE NOT hard to find.

Thank you guys, I think I may pick up a cheap replacement, get the motor running, then attempt to rebuild the old one before I start to paint.

My chinesium O carb is doing ok but took a while to get it there. Had to drill out hole that accepts governor linkage rod to accept it as well as oil bath to carb mount holes not sae they are metric. Needed to adjust float as it was peeing out when shut off and the gas swelled up the bowl gasket/oring instantly and it wouldn’t fit again. I would rebuild what you have but that’s not the popular opinion anymore.

Here's the site for Cub Cadet "O".
It's my go to. It'll start out on the battery, when you open it. Just go to "Assembly", and you'll see all the parts.
https://www.cubcadet.com/equipment/A...0-A/0118500006