Raven

need help...my throttle will not shift smoothly in the helm.(I can never seem to feather the the control).its a side mount with power trim and emergency shut off...I have a 24' trophy hard top with a 5.0 I/O mercruiser engine..i have already had the marina install a new throttle cable,but nothing has changed.  was thinking about getting a Seastar xtream series single lever duel function control. any input would be greatly appreciated