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JRB Operating Procedures Outline
Reverse
Failure of certain components can cause either loss of the ability to stop, or can cause a sudden and
dangerous stop while under way. Of particular importance are:
•
security of the cable mounts and attachments,
•
latch adjustment,
•
freedom of the reverse shaft,
•
security of the cotter,
•
security and correct torque on the duct-link bolt,
•
freedom of movement of the duct,
•
clearance between the duct and the splash guard,
•
security of the splash guard bolts, and
•
security of the duct pivot pins.
Maintain the reverse system in good repair.
WARNING 6: Control with Engine Stopped
There is no steering or reverse control when the engine is stopped. This is because control is
achieved by the water flow from the jet. Never stop the engine when approaching a mooring or any
time when steering will be required.
WARNING 7: Zero Speed Detent
Unlike other propulsion systems that have a gearbox and therefore a positive neutral, the waterjet
relies on the reverse duct position to provide this neutral. Correct operation of the zero speed detent
is the only way the operator has of knowing he is in the neutral or zero speed position. Proper
selection of the zero speed position is essential prior to startup, for safe startup and maneuvering
LOW SPEED M ANOEUVRING
The steering nozzle deflects the jet stream to port or starboard causing the boat to steer to port or
starboard respectively.
The following points should be remembered when operating a water jet craft:
(a)
If the engine is stopped, there is no jet stream to deflect and thus the craft cannot be steered.
Never stop the engine when approaching a mooring or at any time when steering will be
required.
(b)
The wider the throttle is opened the greater the steering effect - i.e., the sharper the turn.
(c)
Steering is available at “neutral” as well as all ahead and astern speeds, a feature which
gives the water jet unrivaled manoeuverability.
1.
Before starting up check:
•
the craft is securely tied up or well clear of other objects, and
•
the helm is centred and the reverse lever at neutral.
2.
After starting, move the helm and reverse lever if necessary to stop boat moving.
Neutral
The neutral position for the reverse lever, or thrust or “bucket” control, allows the boat to be pivoted in
one spot. As mentioned earlier, this gives the boat unparalleled manoeuverability in skilled hands.
The neutral position can be found easily in some boats and with difficulty in others – it’s a matter of
trial and error locating the spot between forward and reverse that keeps the boat stationary. This may
fluctuate depending on the amount of power the boat is producing at the time.
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