Rest Carburetor back to Factory Settings like this….

Turning the fuel adjustment screws all the way in (clockwise) until they barely seat and then turning them out (anticlockwise) by a certain amount, usually one full turn, are common procedures for resetting a tiny two-stroke chainsaw carburetor to its factory settings. These factory settings serve as a starting point for further modifications. Here is a thorough, step-by-step instruction:

Tools and Materials You'll Need:

Small screwdriver or carburetor adjustment tool
Safety glasses and gloves
Owner's manual (if available)
Procedure:

Safety precautions: Before you start, make sure the spark plug is disconnected, the chainsaw is off, and you're wearing the proper protective gear, such as gloves and safety glasses.

Finding the Adjuster Screws: Locate the carburetor's fuel adjustment screws. These are normally found on the side of the carburetor body and are referred to as the "L" (low-speed) and "H" (high-speed) screws. For safety, they could have plastic coverings or caps.

Find Factory Settings: It's important to be aware of the factory settings that the chainsaw's maker suggests. These settings can differ based on the brand and model of the chainsaw, so consult your owner's handbook or the manufacturer's documentation to find out what they should be.

Initial Adjustment - Clockwise Seating: Begin by lightly seating or bottoming out the "L" and "H" screws by clockwise (inward) rotating each of them. When doing this, use caution to prevent harm to the screws or carburetor. The "closed" position is the default setting.

After lightly seating the screws, give each one a complete anticlockwise (outward) turn before backing off. For further fine-tuning, this one-turn anticlockwise adjustment serves as a starting point.

Put on your safety gear and start the chainsaw after reconnecting the spark plug. So that it reaches its operational temperature, give it some time to warm up.

Low-Speed Adjustment (L Screw): Slowly and incrementally crank the "L" screw anticlockwise (outward) while the chainsaw is operating. As you listen to the engine, keep an eye on the chain to see how it moves. The objective is to locate the point where the engine operates without hesitating or stalling. The ideal low-speed setting is indicated by this.

After making the necessary low-speed adjustments, run the engine to full throttle and slowly spin the "H" screw anticlockwise (outward) in tiny increments. The goal is to achieve error-free, fast functioning without too much smoke.

Final Check: After making these modifications, run the chainsaw for a few minutes at full speed and idle to make sure it maintains stability and doesn't stall. To fine-tune the settings, make any little tweaks that are required.

Verify with Factory Settings: Compare your adjustments to the factory settings if you have access to them in your owner's handbook. If there is a sizable difference, modify further as necessary to comply with the manufacturer's instructions.

Lock the Adjuster Screws: Once you're happy with the settings, you can mark the screw positions with a little bit of thread-locking compound or paint to prevent unintended change.

Remember that these are only general instructions for returning a two-stroke chainsaw carburetor to its original default settings. Consult the owner's manual for your chainsaw for exact factory settings. To guarantee optimum performance and safety, consult a qualified chainsaw mechanic if you have questions about carburetor adjustments.

I hope you have gained something from this video.

Thank you

Craig Kirkman (Owner and Creator of The Repair Specialist Channel)

#ChainsawMaintenance
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#SmallEngineMaintenance
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#TwoStrokeEngine
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#SmallEngineRepair
#CarburetorCalibration
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[peglegjim]

I’m a long time 2 stroke service tech, and I’ve had much better luck at just under 1-1/4 turns out from the seat position.
And very importantly, ALWAYS adjust the High Speed before the Low speed.
It will give you the smoothest transition from low to high speeds.

[rickreid]

Excellent video. That's the best way to start an adjustment from zero.

[Baileys-nx]

That's is correct method!! Exactly what I was taught by my small engine instructor

[CervantesLeRoi]

Your channel is THE place I go to for any help. It's like the standard videos for anyone interested in small engine repair. They probably play your videos at colleges.

[Larry-di]

On a Chinese carb I just installed I backed both out 1.5 turns, cranked it up and no more adjustments needed. It performed perfectly.

[fredpierce]

Since All things tend to creep out of whack over time, this tip will help us stay grounded with a reset. TY!

[rashardmcmillian]

This is my new go to channel for small engines! Thanks! Super helpful and easy to understand.

[flycorvus]

oh, yeah
YT is an open source high school for DIY enthusiasts
thanks for sharing, bro'

[omara]

Bro your the best I’ve been trying to fix it for months no videos explained it like u did . Love it easy simple video very informative ❤❤❤❤

[deadtodriving]

Awesome video. I recently purchased a used stihl TS350 that I was told didn’t run and needed the carb to be replaced I came across this as I was about to pull off my carb and get a rebuild kit for it. One screw was out about 7 full turns and the other was out about 3.5 turns. I followed your advice and it fired up on the first pull and idled perfectly.

[johnwade]

Always good to point out that you want to adjust the high speed, bigger flow adjustment first. Open the mixture screw until it slows down from flooding, then go the other direction past where you started until it slows down from starving. Then go back to the middle of the two, known as the sweet spot. Always adjust the low speed last, because it actually is a bleed off of the high speed and if you did them in reverse, doing the low speed first, when you got to the high-speed you would actually be changing the low speed as well. Hi speed is always the farthest away from the engine. If you run into an engine that you can’t adjust with a screwdriver, you can take a hacksaw and cut splits in the aluminum surround that is intended to keep you from adjusting them and at the same time let it cut the slot in the head of the adjuster. That oval surround is to keep in compliance with Californias air board.

[FranceThemba-mqqh]

Thank you so much, you really helped us may God bless you Sir

[israellopez]

This is good for trying to “reset” a carb’s tune so you can get it to start and eventually tune it to run. Different carbs will have factory tunes set for the unit they’re attached to. That’s typically in the owners manual or a dealership workshop manual or something of the like. I work at an ECHO and Husqvarna dealership and we have carburetor adjustment manuals relative to the model and unit that tells us the factory settings for the carbs.

[superflanker]

This tips works on my stihl 038 & 381 too..👍👍

[MaddogRH]

Thank You very much! I did exactly what you said and my Husquavarna blower is working perfectly!

[Antonio-gqfx]

Thanks.I must look at my Honda next time I'm out mowing

[yoanriera]

Excelente allí prende y allí vas girando poco a poco hasta carburar perfectamente 😊

[peterford]

I've been a sub and fan of this channel for years. His descriptions are so helpful and informative, I've actually seen on the tube. 👍👍

[danielchrisronan]

How come there's no heart instead of just a thumbs up. This literally just saved me my weed wacker. I was about to throw it out. 🙏

[saulsaldana]

Thank you so much I have been looking for this information. 👍♥️🇺🇸