Garden

Experienced gardeners share their insights in answering this question :
As chain saws operate in bad conditions , check the air filter for blockage
as there are many carby’s on the market with screw adjustments or no adjustments , exactly what make and model would be a big help

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

The air filter should be clean, fitted to the saw, and the chain brake should be off. What is this? 1 – When the saw is warm and not running, turn the adjusting screw in (clockwise) a half turn, start the saw, repeat this process until the saw idles. 2 – The saw now idles, great!
If your chainsaw still starts and then stops working, check the air filter. Clean or replace the air filter if it is dirty or damaged. Another reason that your chainsaw starts and then stops working could be that the spark arrestor is dirty or clogged. If this is the case, clean it with a wire brush.
To fix the problem, start by draining the gas tank.

Replace the old gas with a fresh mix of gas, being sure to add a stabilizer to keep the ethanol from gelling. Often, just getting fresh gas and stabilizer through the chainsaw`s fuel system may correct the saw and it should stay running.

Just let the saw sit for 30 min and the excess gas will evaporate. Remove the spark plug, dry it, crank over the engine a few times to dry the cylinder. Now refit the plug and try again. Set the switch to “On”, set throttle to fully open, set choke to “Off” and crank over the engine.
Take note of where the screw is when it runs lean or rich. Clockwise is generally the direction you turn to make the mixture leaner, and counterclockwise usually makes it richer. The sweet spot for the perfect idle is usually halfway between these two points.
Most chainsaws idle at around 2,800 to 3,200 revolutions per minute, or RPMs. At this speed, the crankshaft continues to spin, but the clutch doesn`t. When the trigger is pressed and the engine speeds up, the force pushes outward on the clutch.
The fuel line may be clogged from stale fuel deposits, more reasons to cause your chainsaw to cut out when applying throttle. If a fuel line is cracked, it will leak gasoline and draw air from outside into the fuel line. If the line is leaking fuel, it needs to be replaced.
An engine stalls when it`s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. If the saw stalls while it`s idling, adjusting the idle screw, which usually is marked LA, should help.
Information we found online suggests that Stihl Pro Chainsaws have a run time of about 2,000 hours. That means the saw would last you for a minimum of 5.5 years before dying. Keep in mind this time is rated for professional chainsaws and not for regular homeowner saws.
In a gas-powered chainsaw, the on/off switch stops the engine running by preventing the ignition coil from firing. This switch is also called kill switch.
Locate the idle mixture screw and turn it clockwise until the needle lightly touches the seat. Then, turn the screw counterclockwise 1-1/2 turns. If your carburettor has a main jet adjustment screw at the base of the float bowl, turn the screw clockwise until you feel it just touch the seat inside the emulsion tube.
What Causes Chain Saw Kickback? There are two circumstances that can cause kickback when using a chain saw. The first occurs when the moving chain at the tip or the nose of the guide bar strikes an object. The second situation is when the wood closes in, pinching the saw chain in the middle of the cut.
The most probable – and easiest to fix – cause of chain rotation while the chainsaw engine idles is a poorly adjusted idle setting on the carburetor. The result is that too much fuel is delivered to the combustion chamber when the throttle is released, and the engine doesn`t really slow.
The two remedies most likely to cure an engine that doesn`t idle properly are to clean the air filter and adjust carburetor`s idle screw, and cleaning the air filter comes first because the idle adjustment will be incorrect if it`s dirty. The filter is installed behind a cover in the housing just above the handle.
The letters on the screws represent High (H), Low (L) and Idle (T). The H screw regulates the Air/Fuel mix during high RPMs, while the L Screw does the same during low RPMs. The T screw regulates how much fuel is sent to the carburettor while idling until the throttle is pressed.
Never run your chainsaw dry, instead use a quality gas stabilizer. A stabilizer will keep fuel fresh and protect a chainsaw fuel system from damage caused by stale gas.
Gently lay the blade against the wood and allow the momentum of the chain and blade to cut through it. Don`t push or force the saw to cut through the wood. Pushing against the wood could cause the chainsaw to kickback or the blade to get stuck.
The fuel line may be clogged from stale fuel deposits, more reasons to cause your chainsaw to cut out when applying throttle. If a fuel line is cracked, it will leak gasoline and draw air from outside into the fuel line. If the line is leaking fuel, it needs to be replaced.
The most probable – and easiest to fix – cause of chain rotation while the chainsaw engine idles is a poorly adjusted idle setting on the carburetor. The result is that too much fuel is delivered to the combustion chamber when the throttle is released, and the engine doesn`t really slow.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

What is correct adjustment for high and low scews
ANSWER : With the saw warmed up adjust the low for best idle.Adjust the high for best speed then adjust a little richer from that point.Caution……Running at best speed (power) settings which is “lean” will 90% of the time burn the piston……thats why you go a little richer on that setting.

Read Full Q/A … : Garden

Won’t idle ,runs wide open unless you pull choke,solutions?
ANSWER : Maybe a carb overhaul can do the job.

Read Full Q/A … : Garden

How do you adjust high, low, and throttle on echo 3400 chainsaw
ANSWER : Ok, this is an easy job, and a quick tune up. First start up your saw, rev it some so it warms up. Next, make sure your saw idles, if not just turn up the idle a bit first before this. With your saw idling on the ground, turn the L screw about 1 turn either side of where it is, and listen to obtain the fastest and smoothest idle, that takes care of the L screw. Now the H screw must be adjusted while the the saw is at full throttle, turn the H screw and listen for maximum and smoothest engine speed. I sugest this be done with the chain and bar removed from the saw. After you adjust the L and H, then adjust idle to suit.

Read Full Q/A … : Garden

What causes your saw to run hot and not idle it wont run unless you hold the trigger and wnen you let off it dies i have new fuel ines on it have cleaned the carburator
ANSWER : I’m assuming you are using the correct fuel/oil mixture. Your carburetor could still be clogged or misadjusted. The symptoms you describe are those of an air cooled engine running too lean. Also you might want to check the exhaust port to make sure it isn’t clogged with carbon.

Read Full Q/A … : Garden

Sthil FS 90 starts, runs fine, but will not idle down. Have never adjusted anything. Do you have any suggestions as to what the problem may be or should we take it to the dealer?
ANSWER : Ethanol got the carb–dealer

Read Full Q/A … : Garden

HOW DO YOU ADJUST HIGH AND LOW SPEEDS ON HOMELITE BLOWER UTO8087 IF ONLY 1 SCREW ADJUSTMENT. 1 PORT FAC. PLUGED OFF.WHAT SHOULD IDLE RPM LOW B APPROX./ HIGH RPM
ANSWER : All the pictures I have of this carb show two adjusting screws.

Read Full Q/A … : Garden

The engine idles way too fast and will not correct with the sow speed adjustment
ANSWER : Make sure that you are adjusting the idle speed screw, not the idle jet screw (L). If you are adjusting the proper screw, then it is possible that the throttle trigger assembly in the handle has a load of sawdust/dirt that blocks proper return to idle. Take the handle apart carefully, and make notes on how the parts go back together. Check at the carburetor throttle assembly to make sure the throttle arm returns fully to the idle speed screw when the trigger is pulled and released slowly. Check the throttle spring as well to make sure it is undamaged. Hope this helps!

Read Full Q/A … : Garden

Why 2-Cycle engine poulan chainsaw will not idle
ANSWER : It sounds like you have an air leak from carb to carb adapter.

Read Full Q/A … : Garden