Official Aircap gas lawn mower parts

Common replacement parts for Aircap gas walk-behind lawn mowers

• Sparkplug. The sparkplug ignites the fuel mixture inside the engine cylinder to drive the crankshaft.
• Flywheel key. The flywheel key joins the flywheel to the crankshaft and the flywheel key shears off to protect the engine if the mower blade hits an immovable object such as a rock or tree stump.
• Cutting blade. The cutting blade spins below the mower deck to cut the grass.
• Air filter. The air filter traps dust and contaminants from air entering the carburetor.

What to do when your Aircap gas walk-behind mower engine won't stay running

Fuel system problems often cause the engine to stall, so you'll need to rebuild or replace the carburetor if it won't stay running. Our fuel, ignition and compression problems video provides additional tips for troubleshooting fuel system problems.

Some engines stall if the gas cap vent gets clogged. Check your mower's gas cap and clear the vent if it has one. Tuning up the mower engine may also help keep the engine running as you mow the grass.