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2/Helm Control Systems
2.1 General
The helm station is the control center for the boat. The main control systems are the engine
throttle and shift controls, the steering system, and the trim tab controls. These provide the
operator the ability to control speed, direction, boat trim, and attitude. Each manufacturer provides
manuals on the operation and use of their systems.
2.2 Steering System
General
The manual that comes with your steering system provides specific information on your steering
system.
The standard hydraulic steering system has two main components: a helm assembly and
hydraulic cylinder. Turning the helm, which pumps fluid in the hydraulic hoses, activates the
hydraulic cylinder and causes the motor to turn. The helm acts as both pump and reservoir.
Please see diagram in the manual’s appendix for a visual representation of this system. An option
of dual cylinders connected by a tie-bar is also available for easier steering capabilities.
While running at slow speeds, most boats tend to wander slightly back and forth. Keeping the
wheel in the center without overcompensating for the slight wandering will prevent over steering
and reduce the tendency to wander.
Steering System Maintenance
Routine system inspection should occur regularly. Cables, hoses, linkage and helm assemblies
should be inspected for wear, corrosion, cracking, or deterioration. Cleaning and light grease
should be applied to all exposed metal parts and other damaged or deteriorated parts should be
replaced as soon as possible
2.3 Engine Throttle and Shift Controls
Refer to the engine manual supplied with your engine for specific information on your controls.
The ones depicted are those supplied by Yamaha.
There are three major components of the engine throttle and shift controls: handles, throttle cable,
shift cable. Throttle and shift cables are push-pull and are connected to the fuel system
(carburetor or fuel injection) and the other to the shift rod linkage. By moving the handles forward
and back, the operator engages the cables thus controlling the amount of fuel being used and the
gear selector for forward, neutral and reverse. Careful use of the controls provides smooth,
responsive and safe operation.
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