I have an operating question about my new 739. I have the 54HC deck and the control to lower and raise the deck seems very finicky. I’m not sure if I’m doing something wrong or what and maybe I need to be corrected. Its seems like a straight forward process and really cant screw up so maybe something is wrong with the controls. I’ve got plenty of RPM but I have to move the control stick back and forth several times before I get any kind of response. Normal?