The screws are fuel screws so unscrewing them will ritchen the mixture, start with the L screw, this will be the closest to the cylinder, start the engine and warm up, gently screw the jet in, the revs will start to increase as it leans off, at the point where it then starts to die because its too lean, turn the screw out 1/4 turn, now start with the H screw, open the throttle fully, if the engine struggles to accelerate unscrew the jet 1/4 turn and try again.
This is the carb adjusting tool you need. There's zillions of them on eBay so quit f..ing saying there hard to find. I bought a set that had ten different ones in it plus a set of various size brushes for $12 with free shipping and got it in three days.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F303261246147
You can also get the following kit cheap to spruce up your blower. Get it!!!
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F303261246147
Now, set your carbs as follows: screw all three jets in until they stop "lightly!" Then back out the high and low 1 1/4 turn and throttle 2 turns. Should start now. Now tweak the settings
SOURCE: Chain saw will not start
BEFORE YOU DO ANYTHING, CHECK THE
CARBURETOR AND FUEL LINE FOR GUMMY
DEPOSITS. TODAY'S GASOLINES DEGENERATE AFTER STANDING FOR LONG
PERIODS. IN THE FUTURE, WHEN YOU ARE
DONE WITH THE CHAIN SAW, EMPTY THE GAS OUT AND RUN THE SAW TIL THE CARB IS FREE OF RESIDUAL GAS.
SOURCE: Husqvarna Model 141 Chainsaw Carb adjustment
The tool you need is available from Randy's Engine Repair, on his E-Bay store. The price is about $10., plus $3. shipping. Phone for Randy's is (937) 927-5665. It is usually busy.
Ebay item number is: 390025452838. Buy it online. I got mine about a week after I ordered it.
SOURCE: "L" adjustment screw on the carburator
L is for idle speed mixture and H is for full throttle mixture. Adjust H, when engine is warmed up, with full throttle--adjust for high speed, but 4-stroking which should smooth out just as soon as you start cutting. Allow to idle and adjust L for smooth idle, but rich enough to allow the engine to 'follow the throttle'. Set idle speed screw to just allow the chain to stop moving.
SOURCE: Friend rebuilt, rough idle when cold, better
they adjust the air intake and fuel intake witch is the rich lean and you should adust them all the way in and adjust them out as needed you will have to play with it. and guess what its an 81 it is a cold blooded beast please keep it on the road love the classics
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