How To Tune A Chainsaw | Adjusting The Carburetor

Tuning a chainsaw properly will help prolong the life of the saw, and help it work best for whatever jobs you have. We'll show you how to quickly run through a few test with the saw and show you what adjustments to make to the carburetor to ensure your saw is running in tip-top shape!

[mic]

This is the best tuning video for a Husky that I've seen. Most are too technical. This method mimics the methods I've seen pros use when in the woods and need the saw to work right, NOW.

[xGhost]

to the guy that actually knew what he was talking about and explained it so greatly
Thank

[vg]

Thank you! This is the first of its kind that I have seen. And I had never seem the Dump Test at all. I had imagined ways to do this once the first full carburetor adjustments had been completed. I have a new, unused chainsaw and I know it needs to be adjusted for my location's altitude, temp, humidity, fuel grade, etc. I bought a $20 induction Tach/Hour Meter with a sensor cord that wraps around the spark plug cord to get these setting as perfect as possible. It can be set for 1, 2, 3, 4, 6, & 8 cylinder engines, both 2-stroke and 4-stroke, but your procedure should make changing weather conditions' adjustments much easier. Glad I keep looking at videos to find you. Isn't it great that a video done 3 years ago is still helping people? Thanks again! Great job! I took notes at every step. Excellent descriptive explanations, too!

[codybeck]

Great explanation, would have liked to have seen him tune a saw that wasn't already tuned.

[Donnie]

This was so easy to understand the whats and why’s of what your doing compared to other videos - in 4 minutes! Good job!

[seandrake]

Love all these videos of how to adjust a carb on a saw that fires up and ideals instead of one that won’t

[ben]

Very cool and a lot less intimidating than I thought, but like others said, it would be nice to have an off tuned one adjusted since this is explained so well.

[tylerr]

Finally, ive been using an MS390 for years now, in the last two years its started running really bad (revving way to high, bogging and idling way to high causing chain to spin at idle) This video helped me tune it perfectly, Thanks!

[johnclarke]

Before you adjust any chainsaw carb you should let it idle for one minute. Screwing in the idle screw raises the idle. If your chain is turning you should screw it ou until it stops. It alsomay be because you have you chain adjusted to loose or because you have a broken clutch spring. I tighten my chains a little tighter than most folks, so my chains do not rotate at idle. If they creep, as they sometimes do, I just throw the chain break on. I generally set my idle with my digital tach - small saws at 2, 800-3, 000. Bigger saws at 2, 500-2, 700. I set my low jet for good acceleration and my high for a good four stroke. I generally set my high jet first, and then the low jet. I use a tach but I generally set them by ear.

[collinc]

Wow. Awesome video. This is critical knowledge that is easy to understand. That's the old school type of information I've been seeking thank you sir! 🙌

[mycentz]

This is all good info but I think it could have been demonstrated much better by showing the saw running rich or lean and improving on it. My saws run great but I'm planning on doing the exhaust mod so I wanna be a little more informed on tuning my saws.

[AN-nlpu]

Simple no nonsense explanation. Thank you!

[aidenbayne]

Very informative, thanks for quick, clear, and concise info

[Gabriel.]

Very informative and to the point with great tests to help you figure out what’s wrong👍🏼

[jamessmith]

Nice presentation, perfect, for the not so, mechanically inclined.

[crdavis]

Agreed! This is the best tuning video ever! Thanks!

[kerrywoodruff]

The newer saws you take a pair of side cutters and clip the plastic pieces that keep you from turning your adjustments

[drgopta]

Thanks, my echo cs 590 is having the chain keeps spinning. Sometimes it sounds like it is at half throttle. I'll try to adjust that screw. It made me really good at putting the chain brake on. Cheers.

[ProsperInHealth]

Thank you for taking the time to make this video.

[savageoffroadmowers]

Whether or not the chain spins due to being idled too high/loose chain it is good safety practice to always engage the chain brake before removing either hand from the handles. If for some reason the trigger safety switch (on the top of the rear handle) were to fail you could seriously injure yourself or a bystander by accidentally engaging the throttle. A working chain brake is the #1 safety feature you can have on a chainsaw. I'm highly experienced so I use full chisel chains with low drags but inexperienced operators should used anti kick back chains and bars. For the non professional folks who have no reason nor idea how to plunge cut a nose guard is another great safety feature. Also aside from low kick back chains and bars, working chain brake and using common sense another major safety tip is to always operate your saw with a properly sharpened chain. Meaning it is not only sharp but also filed in correspondence with the Lazer cut file guides on each cutting tooth.