I have a 1994 Johnson Faststrike 150. I have had it about 2 years never having a problem before. Took it out past weekend and trim switch at shifter won't work but does at front and on engine. Also for first time since I have had boat, went to leave ramp and soon as it went to laying down to plane out, would start winding out like it was in neutreul. I pulled back on throttle and eased down again and same thing. If not trying to plane out, it runs perfect, starts great. Any help would be greatly appreciated as no money to take to shop.