85 Johnson 150 low power

[jasoncooperpcola]

We took the V20 out Sunday for a short fishing trip and i noticed a problem. The motor was not reving up all the way. My tach is not working but i know it revs up more than what it was. When we got home i put the control all the way down to full throttle and took the cover off, the carbs were only 1/2 to 3/4 open. Is this a problem with the controls? Also it is hard to get it in reverse. I had to put it in forward then pull back to get it in reverse. ALso where can i get another tach? ANd i have a Garmin 178C and my cable pulled out of the antenna, where can i get a new antenna?