I have a 1975 Starcraft Capri 20' with 888 I/O and I broke the shift lever. One of the teeth broke off the gear and I cant engage the trans, I only have throttle. Can I get just the gear or do I have to purchase a new throttle control? It is the control that uses just throttle until you push in the button on the bottom of the lever, then it works throttle and gear selection.