have a 97 johnson ficht. when throtling up motor acts like it is starving for gas and surges. will run up to 3000 RPMS. When trying to throtle beyond this, it surges so badly it will not go beyond. made it back to the ramp. got home and pimer bulb was limp. motor starts and idles fine. is this related to the pimer bulb? thanks. R.T.