I have a 2005 115 HP Yamaha 4 stroke that starts and idles well and after a good warm-up as I head out,runs great until I hit 2400 RPM where it begins to sputter (or miss?) badly. It runs very well above 3000 RPM again to WOT to get on plane, where I throttle back to 4200 RPM where it is still running fine. But it really runs poorly in the 2400 - 3000 RPM range. Fuel has been checked, filters checked, squeezing the primer bulb doesn't help at all either, gets regular oil and filter changes. Spark plugs have all been changed, flushed regularly and only has 375 hours on it total time. I am in a rural coastal community in Alaska and could really use an answer to this one as it is very costly to get to a service center and I do have to rely on this motor for transportation.
