hei ! the prvious owner told us the engine was sometimes "tricky" with cold start. i thought it was just a question of gas. they built in an additional small bensin pump. that sometimes turns on with a strange click click noise. the bensin filter looks clean. what do you think it could be. it seems bensin just doesnt reach the engine. nevertheless, it smells more bensin after 5 min try... :/ thanks for any tip, help.