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.
to constantly monitor the operational condition of the
engine. Close observation of these instruments could
save the engine from damage.
After gaining plane and establishing cruising speed,
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.
The 258 and 278 Vista models have individual
®
gauges in the dash panel as standard instrumentation.
See Figure E5.
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 condi-
tions. Steering and handling difficulties can result from
improper trim tab usage, especially in a following sea.
If unsure of proper trim tab positioning, raise the trim
tabs to the full-up position.
Figure E5: Vista Helm Station
(Representative View - Models May Vary)
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 necessar-
ily the speed of the propeller. They may not register
zero with the ignition key in the OFF position. Note:
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.
The 258 and 278 Vista models come with a tachom-
®
eter/hour meter combination gauge which allows for
hour meter viewing at the helm. Please refer to
Section E-9J - Engine Hour Meter for information
regarding the engine hour meter.
NOTICE
When running in a displacement (very slow speed)
mode, better efficiency will be obtained with the trim
tabs in the full-up position.
Never exceed the maximum recommended
operating RPM of your engines. Maintaining
maximum, or close to maximum RPM for
extended periods can reduce the life of the
engines.
C. Trim Tab Maintenance
Check the fluid level of the trim tab reservoir often.
Always keep the fluid level between the designated
marks on the trim tab pump-reservoir. Refer to the
manufacturers information for specifications on the
type of fluid to be used and other operation and
maintenance information.
Some engines are equipped with devices that limit
engine RPM in accordance with the oil pressure or
engine temperature. Refer to the engine owner’s
manual for additional information.
The tachometer must be set for different engines
installed. This is typically done at the factory. The
tachometer gauge is shown along with the table
detailing the tachometer settings. See Figure E6.
E - 9 ENGINE INSTRUMENTATION
The helm station is equipped with a complete set of
engine instruments. These instruments allow the pilot
Engines, Drives and Instrumentation - Section E
Owner’s Manual Page
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Vista 258, Four Winns Vista 278 |
| Model Year | 2005, 2006, 2007, 2008 |
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx |
| Document File Type | |
| Publisher | fourwinns.com |
| Wikipedia's Page | Outboard Marine Corporation |
| Copyright | Attribution Non-commercial |
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