How do you start a Stihl chainsaw?
Start a cold Stihl chainsaw by placing it on firm, flat ground, engaging the chain brake, and setting the master control lever to full choke. Pull the starter rope until the engine briefly fires, move the lever up one notch to the warm-start position, then pull again until it runs. Blip the throttle to release the fast-idle, then disengage the chain brake before cutting.
Follow these steps for a cold start, in order:
- Set the saw on flat, clear ground and push the chain brake forward to lock the chain.
- Press the decompression valve and prime the fuel bulb if your model has them.
- Move the master control (combi) lever down to the cold-start choke position.
- Hold the saw down with a foot in the rear handle and one hand on the front handle.
- Pull the starter rope steadily until the engine fires once and stalls.
- Move the lever up to the warm-start position and pull again until the engine runs.
- Squeeze and release the throttle to drop it to idle, then pull the chain brake back to release it.
A warm engine skips the choke: leave the lever at the warm-start or run position and pull to start. Never drop-start a saw by swinging it through the air, and keep the chain brake on until you are ready to cut. If the engine floods, see the separate guidance on clearing a flooded saw. Correct starting is easier on a well-kept saw, so keep up a basic chainsaw maintenance routine and use fresh, correctly mixed fuel.
How do you start a warm Stihl chainsaw?
Start a warm Stihl chainsaw by leaving the master control lever in the run position — no choke — engaging the chain brake, and pulling the starter rope until it fires. A warm engine still holds fuel vapor in the cylinder, so choking it again usually causes flooding.
The difference between a cold and warm start is the choke. A cold engine needs the richer mixture that full choke provides to fire the first time; once it has run and warmed, that extra fuel is no longer needed and adding it drowns the plug. If a warm saw does not start within a couple of pulls, check that you have not left it on choke and that the throttle is not stuck open. Between cuts you can leave a warm saw idling briefly rather than shutting it fully off, but never carry a running saw more than a step or two, and always set the chain brake first.
Why won't a Stihl chainsaw start?
A Stihl chainsaw usually won't start because of stale or wrongly mixed fuel, a flooded engine, a fouled spark plug, or a dirty air filter. Work through the cheap, common causes before assuming a serious fault, because most no-start problems are fuel-related.
Run through this checklist in order, from most to least likely:
- Fuel — is it fresh and correctly mixed? Stale two-stroke fuel is the number-one cause of a no-start after storage; drain and refill with fresh mix.
- Flooding — does it smell strongly of fuel? Clear it by pulling with the throttle wide open and the choke off, or dry the spark plug.
- Spark plug — is it wet, sooty, or worn? Clean or replace it and check the gap against the manual.
- Air filter — is it clogged with sawdust? A blocked filter starves the engine; clean or replace it.
- Controls — is the chain brake set correctly and the master control in the right position for a cold or warm start?
If the saw still refuses after these checks, the carburetor may need adjustment or cleaning, which on a dealer-serviced brand like Stihl is best left to the dealer network that assembled it. Prevention is easier than diagnosis: fresh fuel and a clean filter head off most starting trouble.
What safety steps matter when starting a chainsaw?
The safety steps that matter most when starting a chainsaw are engaging the chain brake, starting on firm ground, and never drop-starting the saw in the air. The chain should be locked and clear of anything it could snag when the engine fires.
Always start a saw on the ground or braced securely, with the chain brake on so the chain cannot spin if the engine catches at speed. Keep bystanders back, make sure the bar is clear of the ground, dirt, and debris, and wear cut-resistant chaps and PPE, a helmet with face and hearing protection, and gloves before you pull the cord. Drop-starting — swinging the saw to yank the cord one-handed — is a common cause of serious injury and should never be done. If you are new to a saw, have an experienced operator show you the sequence in person, because a manual and a video are no substitute for hands-on guidance.
These steps are general guidance — always follow the instructions in your model's manual.
