Hey all i need some help as my ys 110 keep scorching the plugs (not blowing the plug) but the result is that i can have 2 or 3 flights then the motor wont hold a constent rpm it drops slowley, this is sorted by putting a freash plug in and it runs fine back to normal im useing os type f plugs and the fuel is 20 20 yamada mix does nyone know what the prob could be?