Gents,<br />I have a '94 4Winns 190 Horizon with an OMC 5.0. Here's the issue(s).<br />When I'm running flat out fast...the top speed is about 40-43 mph. My tach is showing just 3,000rpm and the engine seems to surge, stumble, sputter and I can't gain any more speeding trimming up the lower unit...