I have a 2000 johnson 175 on my Javelin. I began having problems last week and am rather concerned.. So it begins, I was running across a lake and 3 or so miles in the motor gets a loss of power/ RPM's goes from 5500 to 4000 @ WOT. I continue the tourny with trouble getting on plane all day and only being able to turn 4000 R's once again.... next morning initial run across the lake very good until 3 or 4 miles in and again the same problem..... now it has barley enough power to put up on plane. and it idles somewhat rough with some vibration.. I have spark in all 6 cyl. I have good compression I have replaced the fuel filter pulled out all the gas and replaced with fresh gas. checked and changed my plugs. I have read I t could be the stator, but too much money to throw parts at it. any ideas.