I have a 1983 E28+ with a 12 hp Universal (closed system cooled) and a 2 blade folding prop and I'd like to know what other E28+ owners are experiencing as far as max speed under power goes. (I recall seeing somewhere information that seemed to indicate a cruising speed of 5.8 knots and a max speed of 6.5 knots.) I know this is subject to variability but I'd like to hear what people are experiencing in relatively smooth conditions with little or no current. I have had intermittent issues with the engine running hot so I'm reluctant to wind it up to see how fast she'll go. I have no tach so I can't tell what the engine rpms are. The result is I rarely motor much above 3.5 knots and dread having to use the engine in heavier conditions.