How to Adjust the Carburetor on a Stihl Weed Eater

1. Turn the high-speed screw, marked 'H' counterclockwise until it stops.
2. Tighten the 'L' screw all the way, then turn it one turn counterclockwise to open it.
3. Start up the engine and allow it to warm up. The cutting tool will rotate.
4. Press the trigger of the machine to rev the engine.

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Likewise, how do you adjust a Stihl carburetor?

Carburetor Adjustment Procedure

1. Before you start the saw, locate a small flat-bladed screwdriver.
2. Begin by checking the saw's air filter.
3. Check the fuel level.
4. Start the engine and warm it up.
5. Begin by setting the idle speed.
6. Set the low speed fuel adjustment.
7. Go back to step (4) and reset the idle speed.

why does my chainsaw bog down when cutting? Without the right amount of air and fuel in the piston cylinder, the 2-cycle engine in a Stihl chain saw runs inefficiently and the saw loses power. When the saw bogs down during cutting, it's usually the high-speed screw you need to adjust.

Subsequently, question is, what does the L and H mean on a chainsaw?

"On every saw the "h" means that's the "high" side adjustment. It regulates the fuel/air mixture that is being passed into the motor during high rpm's. The "L" means that's the "low" side adjustment. It regulates the fuel/air mixture that is being passed in the motor around the low rpm's"

What is 4 stroking on a chainsaw?

Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Four stroking will occur in a correctly adjusted two stroke engine at full throttle without load when the air-fuel mixture becomes overly rich and prevents the engine from running faster.

Related Question Answers

How do you clean a carburetor?

How to Clean a Carburetor 101

1. Turn off the petcock.
2. Drain the fuel bowl(s)
3. Remove the bowl(s)
4. Clean the bowl(s)
5. Remove the jets.
6. Clean the jets.
7. Reassemble with fresh gaskets.

How do you adjust a rich carburetor?

When it's at running temperature, find the 2 screws on your carburetor that adjust the air and fuel mixture. You can then use a screwdriver to adjust both screws ¼ turn at a time until your engine purrs smoothly. To adjust your idle speed, find the idle mixture screw that limits the flow of fuel at idle.

What does LA mean on a Stihl chainsaw?

You should have 3 screws, not 2. One marked "H", for high speed, one marked "L", for low speed and one marked "LA", which is your low speed air adjustment for idle.

How do you adjust a carburetor?

Carb Quick Guide

1. Verify carburetor is set to stock settings:
2. Start bike, bring to operating temperature.
3. Set idle speed adjusting screw, clockwise to increase rpm, counter-clockwise to decrease rpm.
4. Adjust idle mixture by turning idle mixture screw slowly clockwise until the engine runs poorly.

What size line does a Stihl FS 45 use?

As stated before, it is just for normal usage around the home. The Stihl FS45 is a two-line trimmer that uses . 080 diameter line.

How do you change the line on a Stihl FS 55?

Loading new line in the Autocut trimmer head first involves accessing the spool inside the trimmer head.

1. Place the Stihl FS 55 trimmer on a level surface.
2. Hold the body of the trimmer head with one hand.
3. Press down on the spool and rotate slightly to the left then pull it straight off the trimmer head.

How do you restring a Stihl FS 45?

How to Put String in a Stihl FS 45 Trimmer

1. Turn the FS 45 trimmer off and let the engine cool.
2. Hold the outer rim of the spool retainer.
3. Cut off approximately 25 feet of new string, and fold the string in half.
4. Hold the inner reel with one hand, and with the other begin winding the string around the reel.

Which trimmer line is best?

This guide has all the answers and more.

1. Cyclone CY155S3 – Strongest Trimmer Line.
2. Husqvarna 639005106 – Best Trimmer Line for Heavy Weeds.
3. Oregon 22-895 – Best .
4. DeWALT DWO1DT802 – Best .
5. Maxpower 333665 – Best Nylon Trimmer Line.
6. Tanaka 746570 – Best Cheap Medium-Duty Trimmer Line.

How does a whipper snipper work?

Whipper snippers are designed specifically to cut grass, and only grass. Do not use a whipper snipper to trim down plants with thick stalks. Using a whipper snipper to cut anything thicker and hardier than grass could cause it to stall as leaves and other detritus start to get tangled in the trimmer line.

How do you clean a carburetor on a Stihl trimmer?

Most Stihl trimmers have a screw that releases the cover -- simply turn it counterclockwise with a screwdriver. Remove the air filter and clean it, if necessary. Leave it out of the trimmer. Spray the parts of the carburetor that you can see under the air filter with carburetor cleaner.

How do you start a Stihl FS 55 RC?

Press the throttle trigger lockout and hold it down. At the same time press the throttle trigger until the detent engages with the tab on the housing. When the throttle trigger is engaged, first release the throttle trigger and then the throttle trigger lockout. The machine is now in the starting throttle position.

How do you adjust a Briggs and Stratton carburetor?

Locate the idle adjustment screw on the side of the carburetor. Gently turn the screw clockwise with a flathead screwdriver until the valve touches the seat. Then, back the screw off counterclockwise one-and-a-half turns.