My engine, while pushing slowly thru some large waves at slower speed(less than 10 mph but around 2000 rpm) last weekend, started causing a shrill horn sound under the dash and seriously loosing power. I turned the engine off and the noise stopped. Re-started the engine and a few minutes later, the same thing starts again. I decided we had gone far enough so we dropped anchor and perched for a couple hours. (I have a 10 hp kicker so I wasn't concerned about getting back in).It did not do this again as we mushed thru the 3-5's, got back to the launch, and loaded up to leave. Anyone ever have this problem with a Merc 2-stroke?