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I have a 1985 Mark V with a 15 hp outboard. I would like your comments on how the compares to an inboard. Weight and balance (engine 77 lbs). At morning stern is out of water, under power stern 2 inches under at 5 knots.(this boat never had a inboard) How does the inboard sit in the water and under power Kenny
my boat sits about the same in the water with a 8 hp yanmar 1gm -it weighs about 140 pounds.
distant thunder hull #69
While more weight in the rear can make your boat sit lower, what you are seeing is the stern wave rise at the rear. Watch boats carefully as the pass - you will note a lower water level in the middle and higher at both ends. Look at classic boats and notice the shape, the boat is "bowed" to properly make way through the water. As you overpower a displacement hull, the boat will attempt to climb the bow wave, resulting in a bow-up attitude. Watch a power boat climb the wave and then level out as it planes.
On my Mk I with an outboard, I can make hull speed in calm water with no wind at about half throttle. Adding full power at that point makes the bow rise about 6 inches, and the boat makes the same speed. Inboard or outboard is not relevant to this observation unless it is due to a significant weight differential. Your outboard is lighter than the diesel.
Warren Smith (AKA Tropical Warren)
Serendipity
Galveston Bay, Texas
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