Skipper279
New member
I am having the same problem with my 2017 Merc 115HP 4 stroke. It happens between 2500 to 3500 rpm. I have changed the wires , spark plugs, filters and fuel. I have tested the fuel system for water and there is none. We are thinking about changing fuel pumps. Had the local service dept, look at it from 2018 through to 2020. It worked great in the shop, but as soon as I started boating an hour and a half into my trip it started again. It is good above and below the 25 and 35 K RPM ..no issues as long as I stay out of the trouble zone