turn in then 1 1/4 turns out on high and low factory settings hope this helps
High is 7/8 ths of a turn out from lightly seated. Low would be 1-1/4 turn out. This is ball park settings. The saw should run but will need fine tuning. Be careful not to turn the H screw in to far and lean out the mixture and damage the motor. http://store.chainsawr.com/
Per the tech manual, clockwise until it stops, then back 1 1/4 turns.
The carb on a McCullouch chainsaw can be adjusted by turning the idle mixture screws. This controls how much fuel and air are mixed inside the carburetor.
underneath the carb on the chain side (right hand side there are 2 small screws they look the sameone on top of the other. The top one controls the air to the carb (I think) the bottom controls the flow of gas to the carb. Turn the top one first remember where you had it to begin with and what direction u are turning it. If the does not help return the screw to its original position and do the same with the screw on the bottom. That should solve your problem if it is an air/ gas flow problem. If your chainsaw has been sitting for along time w/gas in it you will need to have it cleaned as the gas will turn to a shellack like substance in the carborator.
pressure test it to see if valves are working, and check diaphragm for holes Just pick up a rebuild kit for it...clean it up real well when its tore apart...then re-intsall it. If it still doesnt work then its new carb time
Factory carb settings for a 84 Honda 200s
You will have to find where it is leaking. Sometimes from the carburetor if so you will have to remove and clean the carb. and may have to adj. or replace the fuel metering plunger. Other times the hoses between the carb. and the tank have holes which allow leakage. Back in the 90s Stihl had problems with the hoses and had to replace many, some are still in service. Another thing could be hole in gas tank which is unusual but could happen. If this is the problem you will have to remove all old fuel, clean tank thoroughly with carb. cleaner, blow out with compressed air and then repair hole with a good oil resistant epoxy such as J B weld.
The answer is that it is an 1118 120 0601 by the Stihl parts catalog, but if you know a good Walbro dealer it is a WA-128-1 at 2/3 the price.
turn both hi and low fully clockwise till seated. then turn each 1 full turn counterclockwise then adjust your idle speed with idle set screw.
Fairly simple. Fuel line up from tank.....underneath carb.....to right side of carb inlet fitting.
General rule of thumb is pressure check fuel hose from tank to carburetor if you can do that. There should be no leaks. Also check tank vent. Next would be the carb, then after that make sure the engine is sealed and has no air leaks. If engine has air leaks it will run bad regardless of position. You didn't say what model the saw is. Check your Stihl dealer. Some carbs have come DOWN in price substantially for newer saws.
The carburetor on a 330 Homelite chainsaw can be adjusted with the 3 screws. Turning to the right increases the richness or gas flow. Turning to the left increases the air into the mixture.