OPERATION
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71
When Underway
If the boat begins to operate in an unsafe way, pull back on the throttle. Moni-
tor the gauges when operating at full throttle.
As the boat begins to get on plane, acceleration will increase since less boat will
be in the water.
WARNING
LOSS OF CONTROL AND UNSAFE BOAT HAZARD
Failure to maintain control can cause death or serious injury. Keep one hand
on the wheel and the other on the shifter/throttle control handle.
High-speed operation on smooth water is very stable, but quick reactions and
adjustments are needed to maintain control. Know your limits and stay within
them. Always keep one hand on the steering wheel and the other on the throt-
tle; constant adjustments are necessary for rapidly changing conditions. Small
inputs of throttle and steering are exaggerated at high speeds. Depending on
the speed, keep watch well ahead so that you may have enough time to react.
PROPELLERS
The propeller converts the engine’s power into the thrust needed to propel the boat.
Care and selection of your propeller is very important to proper boat operation.
Propellers are identified by two numbers, such as 13 x 19. In the number sequence,
the first number is the diameter of the propeller and the second is the pitch.
Pitch is the angle of the blades expressed in the theoretical distance a pro-
peller travels in each revolution. In the above example, the pitch is 19, or each
revolution of the propeller pushes the boat 19 in. (483 mm) through the water.
A 19 pitch is considered “higher” pitched and a 15 pitch propeller is considered
“lower” pitched.
Your ATX boat is already equipped with the proper propeller to achieve maxi-
mum performance with an average load, for your boat. If you have questions,
see your ATX Dealer.
Keep these guidelines in mind when selecting a propeller:
• Engine RPM must be within the recommended operating range. Refer to the
engine owner’s manual.
• Higher propeller pitch reduces: RPM, acceleration and engine noise, and
usually improves fuel economy and top speed.
• Lower propeller pitch increases: RPM, acceleration and engine noise, and
reduces fuel economy and top speed.
Refer to Section 7, CARE AND MAINTENANCE, Propeller, for information
on removal and installation.
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