Where can I get a good used throttle control cable for my 1978 Merc 115? If anyone has one, they can email me at the address below. Or I need the plastic thing that goes on the end. My cable is good, but the plastic thing is broken.<br /><br />iBoats has one for 27.00 including shipping, but I dont want to buy the whole thing unless I have to. Or should I just go ahead and buy it?