Hello I have the problem that my scooter despite ignition spark and a noticeable compression (by keeping the hole of the spark plug tried) and petrol in the carburetor did not start after I had cleaned the carburetor once it did not jump any more. then I ordered my new one and again tried to do it again. after that I saw that the membrane block has not completely closed and therefore was leaking now I ordered a new one built and now it still doesn’t go on. then I kept a finger on the spark plug again and you feel a certain pressure .despite everything the scooter doesn’t want to start petrol is still in the tank where could now still be the error