I recently purchased 1987 Reinell 5.7 OMC.<br /><br />When I accelerate hard (full throttle) the engine climbs to 2200 RPM then just stays there bogging along. If I back off on the throttle to about 2/3-3/4 and ease it in it will pass thru the 2200 RPM and will then come up on plane and reach a...