buster L, Owner'S Handbook Manual

Page: 17 / 31


Inha Works Ltd. 2009 17 (31)
5.9 Control characteristics
5.9.1 Driving at high speeds
The recommended maximum engine output for the Buster L is 37 kW (50 hp).
Do not use a boat with an engine that has a greater output than that which is
indicated on the manufacturer’s plate.
Most engines feature electro-hydraulic power trims. The basic rules for adjusting the
engine's power trim are:
• When raising the boat to plane, go to the ‘bow down’ position.
•
When the boat is planing, and in a moderate swell, raise the bow until the boat
begins to buck, and the propeller loses its grip (ventilates) or the engine
approaches the upper limit of the normal area of adjustment. Thereafter, lower
the prow slightly until the boat stabilises. The power trim can be optimised with
the aid of the log.
• In a counter swell, lower the bow for a smoother ride. In a favourable swell,
and in a very high counter swell, raise the bow slightly so that it does not dive
(submerge).
•
Do not drive the boat at high speed when the engine power trim is at a
negative angle – i.e. with the bow low – as the boat may heel and the steering
become unstable.
Also see the instruction manual for the engine.
The outboard engine is normally intended to be installed at a height where the
engine’s cavitation plate is at the same elevation as the keel of the boat.
WARNING! At high speeds, adjust the power trim with care, as it
radically changes the behaviour of the boat. Do not drive
with the bow too low as the boat can suddenly deviate from
its path.
WARNING!
Rapid turns can lead to loss of control. Reduce speed before
sharp turns in whatever direction you are going.
WARNING!
Waves reduce the boat’s controllability, causing it to heel.
Bear this in mind and reduce speed in a rising swell.
Learn the rules of navigation, from books and courses, and follow them. Also observe
the requirements of COLREG (Convention on the International Regulations for
Preventing Collisions at Sea). Navigate carefully and use new or updated sea charts.
Always adjust your speed in accordance with prevailing conditions and the
environment. Bear in mind:
• the state of the sea (ask your passengers for their opinions on a comfortable
speed)
• your own wake (greater when rising to plane, smaller at displacement speed,
i.e., below 6 knots). Observe prohibitions associated with a swell. Reduce your