I'm in the process of buying a 2003 30' Luhrs Open with 2006 Cummins QSB 5.9 385 HP engines. Yesterday on the sea trial i saw that the lower helm throttle cables were very hard to operate. Upper controls work fine but the issue is down below. They moved but it required a little more effort than usually needed. How much of job is it to install new? And being I'm not much of a mechanic what would be a ballpark price to have installed?