When I borescoped the cylinder, the piston crown looked like sandpaper. The rings were seized. Repair cost: $850. Cost of a genuine Stiga air filter: $18.
Let’s dismantle the myths, the science, and the specific rituals required to keep your Stiga’s lungs clean. Most owners perform the "five-tap" method: remove the filter, slap it against the tire five times, and reinstall it. From the outside, the filter looks "okay." But here is the microscopic reality. luftfilter stiga gressklipper
I am talking about the (air filter) on your Stiga gressklipper (lawn mower). When I borescoped the cylinder, the piston crown
In the Nordic climate, where wet springs give way to dusty, pollen-heavy summers, your Stiga’s engine is breathing through a straw filled with cotton candy made of grass clippings, mold spores, and silica dust. If you think a dirty filter just reduces performance, you are wrong. It is actively committing slow homicide on your cylinder walls. Cost of a genuine Stiga air filter: $18
I pulled the air filter housing. It looked pristine. The paper filter was white. But when I held it up to the sun, I saw a single, hairline crack along the rubber seal—less than 1mm wide. That crack had allowed fine, dry soil to enter the intake manifold for approximately 8 hours of mowing.