World Cat 280DC-X - 5.9.3 Weather Conditions; 5.9.4 Load

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5.8.5 Keep the Boat Level (if the seas change or people move on the boat)
Trim the High-Side-High. When one side of the bow is high compared to the horizon, simply trim the
high-side motor up. (If it cavitates then trim the low-side-low). Dierent models have dierent sensivity to
trim (do not over-correct as this may cause the boat to pitch in at calm water at high speeds).
5.8.6 Handling Dierent Sea Condions
• Head Sea: trim motors in to keep the bow down
• Following Sea: trim out to keep the bow out of the water
• Calm water: trim engines up to run on the back of the hull
5.8.7 Boang Tips
Experience is the best way to determine the handling characteriscs of your catamaran. Operang the boat
in mulple sea condions and under various loads will help you predict how the boat will perform in any
situaon. World Cat provides the following recommendaons regarding the performance of your catamaran:
• Establish an RPM chart which details the speed and fuel consumpon at various RPM levels
to achieve the most economical operaon.
• Monitor fuel gauges to determine the amount of operang me remaining at a
given reading.
• Determine minimum speed for eecve steering in close quarters.
• Determine the turning radius required at various speeds.
• Determine the rates of acceleraon and deceleraon with various load condions. Include
the distance required to stop the boat at various speeds.
Use the informaon provided in secon 6 of the Sportsh, Cruisers, Yachts Owner’s Manual for more
informaon on boat handling.
5.9 Performance Factors
Proper setup and maintenance of the systems on your boat is important to ensuring proper performance,
but be aware they are not the only factors which aect it. Several things which contribute to the level of
performance of your catamaran can change between or during trips.
5.9.1 Engine Eciency
Without proper maintenance, your Yamaha engines will gradually lose power, resulng in a loss of speed.
Use the recommendaons in the engine’s owners manual to schedule roune maintenance procedures and
as a guide for the correct RPM range for your engines. Neglecng to do so may result in loss of performance
and an increased risk of failure.
5.9.2 Propeller Condion
The size and condion of your prop also plays a major role in the performance of your catamaran. A damaged
prop can result in lower speeds, sudden drops in RPM, increased fuel consumpon, and severe vibraon
while running. Improperly sized props can cause damage to your engine as a result of exceeding the
maximum or minimum RPM levels.