To clean a chainsaw air filter, stop and cool the saw, clean loose debris from the closed cover, then remove and service the filter only by the method in that model’s manual. Replace the filter instead if its media or sealing edge is damaged, its type is uncertain, or the approved cleaning method does not clear it.
A petrol chainsaw that starts then dies usually needs its fuel, starting procedure, air path, or fuel-delivery system checked—not another round of random carburetor adjustments. Stop repeated starts, use the exact operator manual, and record when the engine stops; that pattern tells you which owner-level check is worth making. First, make the saw safe to inspect Let the engine cool. Engage the chain brake, switch the saw off, and work outdoors or in a well-ventilated place away from ignition sources. Fit the bar cover whenever you are not checking the cutting attachment.