I recently purchased a Cota 200 and am able to get it started but I had some general questions regarding the carb and the decompression lever. There is a lever that moves either up or down located on the carb. What position should this be in when starting? What is this lever for? Also, when it is running and I move the decompression lever it stops the engine. Will the engine start with the decompression lever on? what is the purpose of this lever. thanks for any help you can offer. I think the carb needs rebuilt.