" I was in rough water over the weekend and was heading back to the landing when I noticed my top end speed had dropped about 10 mph. RPM was still the same. I tried adjusting the trim because of the rough water, but that didn't help. I was thinking spark plugs and I talked myself out of that thinking my RPM would have gone down. Same thought pattern for fuel pump. The engine didn't seem starved for gas. Please help! "