Hello, I just received this Jet ski and need some help with it. It is a 2006 and it starts great, but when I go to take off, sometimes it only goes to 4 K RPMs and then sometimes it runs great and goes to 6K RPMs. It just like sometimes when you full throttle is only goes to 4K and kind sounds like it bogged down. But when it takes off at the 6K it is awsome. when it does only go to the 4K , after a couple seconds then oit will take off as it is suppose to.