™
378
B. Induce Planing & Controlling Trim Angle
C. Trim Tab Maintenance
Trim tabs can also be used to facilitate faster planing and Check the fluid level of the trim tab reservoir often. Al-
allow better control of the running angle.
ways keep the fluid level between the designated marks
on the trim tab pump-reservoir. Refer to the manufactur-
Before accelerating and trying to gain plane, press both ers information for specifications on the type of fluid to be
upper trim tab switches. This will cause both trim tabs to used and other operation and maintenance information.
move downward and force the bow down when running.
Thiscanalsobeusedwhenrunningtheboatwithaheavy
loadaboard.
E - 8
ENGINEINSTRUMENTATION
Moving the trim tabs downward will increase the lift and The helm station is equipped with a complete set of en-
the boat will achieve plane faster, or stay on plane at a gine instruments. These instruments allow the pilot to
lower engine and boat speed.
constantly monitor the operational condition of the en-
gine. Close observation of these instruments could save
Aftergainingplaneandestablishingcruisingspeed,press- the engine from damage.
ing both lower trim tab switches will cause both trim tabs
tomoveupwardandwillallowthebowtorise. Thisshould The 378 Vista™ has individual gauges in the dash panel
be used to adjust the running attitude of the boat to de- as standard instrumentation. See Figure E7.
crease the drag at cruising speed or above, or when run-
ning 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
substantialsteeringandhandlingdifficulties. Beextremely
carefulwhenrunninginafollowingsea. Theeffect 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.
Figure E7: 378V Helm Station
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
areextremelycritical. Bepreparedtoslowdown
should handling difficulties arise.
A. Tachometer
The tachometers indicate the speed of the engines in
revolutionsperminute(rpm)andarepresetbyFourWinns.
Thisspeedisnottheboatspeedornecessarilythespeed
of the propeller. They may not register zero with the igni-
tion key in the OFF position.
Whenrunninginadisplacement(veryslowspeed)mode,
better efficiency will be obtained with the trim tabs in the
full-up position.
NOTICE
Never exceed the maximum recommended
operating RPM of your engines. Maintaining
maximum, or close to maximum RPM for ex-
tendedperiodscanreducethelifeoftheengines.
378 Vista™ Owner’s Manual
Section E
Page8
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Vista 378 |
| Model Year | 2005 |
| 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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