I have a 1999 force 40 hp on a 16 foot smoker craft. I bought the boat from original owner and he was unsure about the surge. The boat runs perfect at all speeds except WOT. At WOT it starts to surge. It is not terrible just want to get it corrected. I have replaced fuel lines, spark plugs, carb kit, primer bulb. I have tried squeezing primer bulb while running with no change. If a fuel pump is failing what are the signs? could it maybe float level? Its at the local shop now being looked at but they cant narrow it down either but they do acknowledge the surge as well. They think it is fuel related. they were taking it back out today with a remote gas tank and hose. Any help is much appreciated, Thank You