I have a 1996 Mariner 115 4 cyl 2 stroke (2+2) outboard.
It starts and runs fine at idol...but is back and forth on the 2-4 cylinders all the way up to 4300 rpms. It jumps at 1,400 rpm...as it should.
I have checked all the filters and lines as well the wires to the boost pump.
Anyone know how...
