Translations:KAVAN AP06A - Instruction Manual/85/en

Avoid running the engine under dusty conditions. If you are in a dusty environment we suggest using an air filter over the carburettor. A small piece of women’s nylon stocking placed over the carburettor and held in place with a small rubber band works well for small engines.
At the end of every flying day, purge the engine of fuel by disconnecting the fuel line and allowing the engine to run dry of fuel.
Use a high quality after run oil in the engine after you have purged the engine of fuel. Inject the oil into the engine through the carburettor. Turn the engine over several times to distribute the lubricant inside the engine.
Wipe the outside of the engine dry using a soft cloth.