Operations
Bow Up
Too much trim-out puts the bow of the boat too high in the water. Performance and economy are
decreased because the hull of the boat is pushing the water and there is more air drag . Excessive
trim-out can also cause the propeller to ventilate, which reduces performance further, and the
boat may “porpoise” (hop in the water), which could throw the operator and passengers
overboard.
Bow Down
Too much trim-in causes the boat to “plow” through the water, decreasing fuel economy and
making it hard to increase speed. Operating with excessive trim-in at higher speeds also makes
the boat unstable. Resistance at tile bow is greatly increased, heightening the danger of “bow
steering” and making operation difcult and dangerous.
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