Nighthawk
Seaman Apprentice
- Joined
- Mar 24, 2007
- Messages
- 41
I am still experiencing the surge sickness on my 1987 Mercury 25 serial OB213279. I have rebuilt the carb , have a new fuel line assembly and new fuel tank and have installed new plug wires. Both cylinders are firing and the compression is 128 on the number 1 cylinder and 127 on the number 2 cylinder.
The motor starts and idles fine and takes partial throttle before showing any sign of problems. I can accellerate up to a certain point then the motor starts surging and will not stop until I back the throttle off. If I go to full throttle the motor sounds like it is bogging out and loses rpm. I cant give any rpm readings because my boat doesnt have a tach .
Any advice will be greatly appreciated.
The motor starts and idles fine and takes partial throttle before showing any sign of problems. I can accellerate up to a certain point then the motor starts surging and will not stop until I back the throttle off. If I go to full throttle the motor sounds like it is bogging out and loses rpm. I cant give any rpm readings because my boat doesnt have a tach .
Any advice will be greatly appreciated.