My cable is stiff...help

[Briguy]

My dealer installed throttle cables on my 115hp suzuki's 3 years ago and boy are they stiff.(and getting stiffer) I have checked for kinks and bends but there are none that would explain the stiffness. I can barely get the motors from fwd to reverse and forget finding neutral the first time. I saw shipshape and John G used some teleflex tx extreme cables and said they were smooth for applications that have many bends, he also said that's what honda uses. Any thoughts?????