Owner`s manual

2012 World Cat 270TE Owners Manual
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
5.10.7 Boating Tips
Experience is the best way to determine the handling characteristics of your catamaran. Operating the boat in multiple
sea conditions and under various loads will help you predict how the boat will perform in any situation. World Cat
provides the following recommendations regarding the performance of your catamaran:
• Establish an RPM chart which details the speed and fuel consumption at various RPM levels to achieve the
most economical operation.
• Monitor fuel gauges to determine the amount of operating time remaining at a given reading.
• Determine minimum speed for effective steering in close quarters.
• Determine the turning radius required at various speeds.
• Determine the rates of acceleration and deceleration with various load conditions. Include the distance
required to stop the boat at various speeds.
Use the information provided in section 6 of the Sportfish, Cruisers, Yachts Owner’s Manual for more information on
boat handling.
5.11 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 affect it. Several things which contribute to the level of performance of your
catamaran can change between or during trips.
5.11.1 Engine Efficiency
Without proper maintenance, your engine(s) will gradually lose power, resulting in a loss of speed. Use the
recommendations in the engine’s owners manual to schedule routine maintenance procedures and as a guide for the
correct RPM range for your engines. Neglecting to do so may result in loss of performance and an increased risk of
failure.
5.11.2 Propeller Condition
The size and condition 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 consumption, and severe vibration while running.
Improperly sized props can cause damage to your engine as a result of exceeding the maximum or minimum RPM
levels.
5.11.3 Weather Conditions
Barometric pressure and humidity can affect the output of your engines. For example, on an extremely hot and humid
day, your engine can experience as much as a 10 percent loss in horsepower. Although you should monitor your
engines’ performance, be aware that the weather could be a major factor in your boats performance.
5.11.4 Load
Increased load can obviously affect performance, especially if the load is unbalanced. Passengers, gear, and fuel are all
examples of things which can affect your vessel. Fuel levels change through the day, and greatly affect the attitude of
your boat. When necessary, make adjustments to engine trim and load distribution to compensate for fuel usage.
5.11.5 Marine Growth
If you store your boat in the water or fail to clean it after each trip, the existence of marine growth can contribute to a
loss of performance. A decline in speed or increased fuel consumption can occur. Prevent this by applying a marine
growth inhibitor or by cleaning your boat thoroughly after each trip.
5.11.6 Bottom Paint
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