V6 idles smooth, runs well except when executing a quick accleration (i.e. in forward gear, the slack pulled out of ski rope, and skier yells "hit it")<br />I encounter marked hesitation. As in floored, but little change in rpm. Sometimes will start to increase rpm a little <br />and then hesitate. Engine does not die. If do gradual acceleration, boat will run really well. Have changed gas/water separator. Have mostly new <br />gas (premium) and all gas was with stabilizer added. Have owned 1 season, starting second.<br />Had this problem much of last summer, but it would occasionally get better if increased octane, <br />added SeaFoam, etc, so never had anyone look at it. Some friends suggested the kill switch was malfunctioning?<br />Is this a likely source?? I pulled one plug last summer and it was a really clean looking light tan. Is this anything<br />I can figure out?? Any suggestions??? Will an annual service/tuneup correct this problem??<br /><br />Thanks.