Four winns 338 Vista, Руководство пользователя

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Section E
Page 8
348 Vista Owner’s Manual
08/01
After stabilization of speed and direction, depress the
upper half of the appropriate trim tab switch to achieve a
level side to side running attitude. Be sure to press the
correct trim tab switch to obtain the desired result.
After depressing a trim tab switch, always wait and allow
time for the change in trim tab position to take effect. DO
NOT continue to depress the trim tab switch while awaiting
trim tab reaction. By the time the effect is noted, the trim
tab will move too far and thus overcompensate.
B. Induce Planing & Controlling Trim Angle
Trim tabs can also be used to facilitate faster planing and
allow better control of the running angle.
Before accelerating and trying to gain plane, depress both
upper trim tab switches. This will cause both trim tabs to
move downward and force the bow down when running.
This can also be used when running the boat with a heavy
load aboard.
Moving the trim tabs downward will increase the lift and
the boat will achieve plane faster, or stay on plane at a
lower engine and boat speed.
After gaining plane and establishing cruising speed, de-
pressing both lower trim tab switches will cause both trim
tabs to move upward and will allow the bow to rise. This
should be used to adjust the running attitude of the boat
to decrease the drag at cruising speed or above, or when
running in a following sea.
When running at an engine speed that results in the boat
falling off plane or causes the boat to plane inefficiently,
lowering both tabs slightly (bow down) will improve the
running angle and improve operating efficiency.
Optimum efficiency is obtained when operating at a 3 to
5 degree running angle. Utilizing too much “Bow Down”
trim tab can reduce operating efficiency and cause
substantial steering and handling difficulties. Be extremely
careful when running in a following sea. The effect of trim
tabs is amplified under such conditions. Steering and
handling difficulties can result from improper trim tab us-
age, especially in a following sea. If unsure of proper trim
tab positioning, raise the trim tabs to the full-up position.
When running at high engine speeds, be sure
the trim tabs are in the full up position. Trim tab
action should be only enough to compensate for
any listing. Trim tab adjustments at high speeds
are extremely critical. Be prepared to slow down
should handling difficulties arise.
When running in a displacement (very slow speed) mode,
better efficiency will be obtained with the trim tabs in the
full-up position.
C. Trim Tab Maintenance
Check the fluid level of the trim tab reservoir often. Al-
ways keep the fluid level between the designated marks
on the trim tab pump-reservoir. Refer to the manufactur-
ers information for specifications on the type of fluid to be
used and other operation and maintenance information.
E - 9 ENGINE INSTRUMENTATION
The helm station is equipped with a complete set of en-
gine instruments. These instruments allow the pilot to
constantly monitor the operational condition of the en-
gine. Close observation of these instruments could save
the engine from damage.
The 348 Vista has individual VDO gauges in the dash
panel as standard instrumentation. See Figure E7.
A. Tachometer
The tachometers indicate the speed of the engines in
revolutions per minute (rpm) and are preset by Four Winns.
This speed is not the boat speed or necessarily the speed
of the propeller. They may not register zero with the
Ignition Key in the OFF position.
Figure E7: 348V Helm Station