I have a '91 Force 120 and had a problem with the throttle this weekend. I bought, 18ft. Cobra, with a missing throttle box. I bought one and installed it myself. It works well in terms of putting the engine in gear and throttlign up and down. However, when I try to get the boat in neutral I have a ton of problems. I have to yank the throttle back hard to pop it back into nuetral. After that the idle starts racing and I have to shut off the engine. Any suggestions?