Set carb after putting a new kit in

Yes, you need to clean and rebuild the carb. Initial adjustment is 1 full turn on both low and high settings.

First, you will need to get a rebuild kit for it. This contains gaskets and other bits that wear and need replacing on occasion. There will be a number on a tag or the carb body that the parts store will need to get the right kit. There's no point in trying to reuse the old gaskets, if you are going to try that, then don't waste your time rebuilding.

The kit will contain a sheet of paper whjich will give you an exploded diagram of all the parts in your carburator and where they belong. there will also be information on various settings for idle, choke, etc. Don't lose these sheets.

When you start to disassemble the carb, keep the old gaskets to compare with new ones. When you remove the idle screws, turn them in until they stop. Be gentle when you do this and count the number of turns. Write that number down, so when you put it back together you know where the idle setting is supposed to be. There will be extra gaskets in the kit and they will all be different. You must replace with exactly the same as what you took off. Also pay very close attention the how the choke linkage comes apart. It will go together more than 1 way so you can get it wrong. This will make the car act up or maybe not even start.

Soak the carb in a good quality cleaner and make sure everything is clean and all the lines are open before you start to reassemble it.Use your diagrams to make sure you put everthing back where it belongs, replacing with new parts when possible. Be very careful with the float measurement, it must be exact, close won't work.

This is going to take you several hours, so don't be in a rush.

The gaskets and the pliable diaphragms in the carb have dried out. Therefore, the carb cannot deliver fuel to the engine. Disassembly and cleaning of the carb will be required (esp. if very old fuel left to dry inside it). After that, a rebuild kit or at the least; a gasket and diaphragm kit will need to be installed. This will then enable fuel to get to the engine. If you repost the exact model number of this machine, I can reply with the part number for a rebuild or gasket and diaphragm kit. Your unit has probably a Zama (will be wrote on the cover with vent-hole) or Walbro carburetor. Kits are available for both.

You probably know that it may need a rebuild kit with the new gaskets and diaphragms in it. It is quite possible a kit exists for it even though it is antique. Is it a Walbro or a Zama? I will send you to a tutorial by Zama on tuning a 2 stroke carb which includes your mixture screw settings. If you need help finding a rebuild kit or just a gasket w/diaphragms kit, please post back. I will be glad to assist.

http://www.zamacarb.com/tipspage.html

Seems that the crank/timing settings needs a closerr look than to feel that the carb is faulty.The engine is becoming rougher because the firing angle is changed. I also doubt that the carb /jet kit be replaced back with the original as the new jet is not matching.
Now start the engine and set up idle to more than minimum so that the vehicle does not stall but is somewhat smooth. Now try to advance/****** the timing and notice if the engine becomes smoother irrespective of the TDC settings. If so set to the best level and bring down the Idle , do not reduce off air but check the mixture at the exhaust to have this done all over.
Somewhere in the new change a point has been missed..

You either have a air leak in a fuel line, carb jets are plugged, or carb seals went bad. They sell a rebuild kit for your carb, 10-15 dollars. I would start by removing carb spraying it with carb cleaner and blowing it out with a air gun, put it back on and see if this worked. If not I would replace fuel lines and rebuild carb.

REPLACE the BATTERY IMMEDIATELY !!!..So, you put in new spark plugs.. not better..?? .. take it to a QUALIFIED PROFESSIONAL (very experienced and factory trained) to have the carbs checked,,!!.. "rebuild kits" are usually a disaster. they ask you to replace parts that don't need replacing with generic junk... I get so tired of idiots that think they know something about a carburetor.. and then attempt to install a generic "rebuild kit" .....and ......99% of the time, a SIMPLE CLEANING and SETTING/SYNCHRONIZATION is ALL THEY NEED!!!

hello, usually when gas sets in carb for a long time it turns into a varnish, you will have to take carb apart and clean all jets out, even the fuel pump may be clogged up, you will probably have to rebuild carb, unless you have access to air line to blow any and all jets, pretty much all passage ways, power jets, in other words you have a carb problem, you may need a new one, unless you have a strong solvent, that will break away any varnish or gum up.

what exactly do you want to know? Carb. mixture settings are as follows: L-head engines

Tecumseh carbs.........mainscrew 1 3/4 turns idle screw 1 1/4 turns
Walboro carbs........... mainscrew 1 1/2 turns idle screw 1 1/4 turns

L-head and OHV heavy duty engines 1 turns for both

Bad seal. Rebuild the Carb with a new kit and make sure you have no extra parts. You should be able to get a carb rebuild kit from your local auto parts store.