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G - 5
PROPELLER TORQUE
The propeller rotation of a single engine installation will
exert a directional force on the steering system. This
can cause the steering to be harder in one direction than
the other, and is call propeller torque.
Propeller torque can also cause the boat to wander (not
follow a straight line) when operated at low speeds. This
condition is normal and can be corrected only by increas-
ing engine rpm. Wind, water currents and play in steer-
ing components can cause equivalent effects.
G - 6
STEERING SYSTEM MAINTENANCE
A periodic inspection of the helm pump and reservoir,
hydraulic hoses, the hydraulic cylinder, tie bar assem-
bly, bearing, seals, rudder angle sender and rudder should
be made. See Figures G4 - G6. Signs of corrosion,
cracking, loosening of fastenings, excessive wear, or de-
terioration should be immediately corrected. Failure to
do so could lead to steering system failure and corre-
sponding loss of control.
The helm should be so adjusted that the steering wheel
is centered with the rudders in the straight ahead posi-
tion. There should be an equal number of turns to port
and starboard from the straight ahead position. If adjust-
ment becomes necessary, see your Four Winns dealer.
All cables, helm assemblies, and steering connections
should be periodically lubricated with a light, waterproof
grease or as indicated in the manufacturers information
provided in the owner's packet.
Inboard boats should also be inspected for leakage around
the rudder port seal. The packing nut(s) should be tight
enough to prevent leakage, yet loose enough so exces-
sive drag is not placed on the rudder shafts. Hard steer-
ing could otherwise result. If the leakage cannot be stopped
without exerting excessive drag on the rudder shaft, re-
placement of the seal is required.
To prevent water from entering into the boat, al-
ways be sure the lock nuts are tightened securely
to prevent the packing nuts from loosening.
378 Vista™ Owner's Manual
™
378
Hydraulic steering systems must periodically have all air
purged from the system. Review the information provided
by the hydraulic steering manufacturer for proper specifi-
cations and details on system service and maintenance.
Section G
Page 3
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