I have a K&B 7.5 Pro aircooled outboard. Question:
Idle rich/lean disk on carb. Is it clockwise to lean it and counter-clockwise to richen it up at idle.
Just installed HTB pipe and motor runs great wide open. Midrange is a dead spot with lots of smoke from exhaust and if I wide open and let off quick it stalls. The motor will not idle for long without loading-up and stalling. Also it acts as if it's lean when it quits running but is running way fat as it takes some time to clear up and there is lots of smoke from the pipe when it's running.
I have checked the carb and fuel system for blockage but all looks good, I've tried different props and all kinds of settings on the needle and disk without changing the problem. Also the motor ran perfect the first 4 runs with the new pipe and then developed the problem so I don't think it's the pipe. The top end is 5 mph faster on radar even with the poor running at idle and midrange.
Any help greatly appreaciated,
John Smith
Idle rich/lean disk on carb. Is it clockwise to lean it and counter-clockwise to richen it up at idle.
Just installed HTB pipe and motor runs great wide open. Midrange is a dead spot with lots of smoke from exhaust and if I wide open and let off quick it stalls. The motor will not idle for long without loading-up and stalling. Also it acts as if it's lean when it quits running but is running way fat as it takes some time to clear up and there is lots of smoke from the pipe when it's running.
I have checked the carb and fuel system for blockage but all looks good, I've tried different props and all kinds of settings on the needle and disk without changing the problem. Also the motor ran perfect the first 4 runs with the new pipe and then developed the problem so I don't think it's the pipe. The top end is 5 mph faster on radar even with the poor running at idle and midrange.
Any help greatly appreaciated,
John Smith