ed while at dockside. Press both trim tab controls down
until tabs reach their full up position.
The power unit should never be trimmed up to a
point where the propeller cavitates (or slips). A
rapid increase in engine rpm’s is evidence of
cavitation. If this occurs accidentally while running
at full throttle, immediately lower the drive trim and
reduce the throttle until the slipping stops. If
necessary, have your dealer reset the trim limit
switch (if provided) to avoid over-trimming in the
If the prop slips at lower planing speeds, the drive
may be trimmed too high. Immediately lower the
drive unit until the prop grabs again to restore
Trimming out, in addition to raising the bow, also
lifts the boat higher, gaining speed because less
hull is in the water.
Figure S1: Trimming the Boat with Trim Tabs
B. Tilt/Trim Control Switch - Stern Drive Models Only
NOTE: Refer to the control instructions regarding the
power trim controls installed on your boat.
NOTE: Trim refers to the angle of the lower unit in
relation to the bottom of the boat. With respect to
trimming, the words in, down, under, and forward, have
the same meaning as do up, out, and aft.
The standard trim control switch is located on the
control lever handle.
The switch controls the position of the stern drive.
Proper trim is very important in boating.
In the case of low or heavy bow attitude, the boat
tends to “plow” (Figure S2. The lower unit is
trimmed too far under or forward. Trim the unit UP
(out) to correct this situation.
If the bow is too high, the boat tends to “porpoise”
(Figure S4). The drive unit is trimmed up or out too
far. Trim DN (in) to correct.
A good practice is to get underway (especially
when fully loaded or pulling a skier) with the unit
trimmed all the way DN (under). After the boat is
on plane, adjust the trim out slightly to obtain the
proper bow attitude and engine speed.
Figures S2-S4: Trimming the Boat with Outdrive
S - 8 NAVIGATION LIGHTS
Trim also affects propeller selection and fuel
efﬁciency. All models should be “propped” to be in
the upper half of the maximum rpm range with the
boat lightly loaded and the drive trimmed up to
maximum. This conﬁguration allows the engine to
operate within the recommended rpm range with
a heavy load.
Although night activities are limited, cruising at night
can be very pleasurable. It can also be dangerous if
you don’t pay close attention to water levels and
obstacles. Be especially careful of shallow waters and
watch for submerged debris, rocks and other obsta-
cles in the water. Your navigation lights are intended
only to prevent collision, not to improve your night
vision. You may choose to use a spotlight instead.
Pre-Launch and Underway - Section S
Owner’s Manual Page 182
|Categories||Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals|
|Tags||Four Winns Vista 338|
|Model Year||2007, 2008|
|Document Type||Owner's Manual|
|Product Brand||Boats and Cruisers, Four Winns. For support contact your dealer at http://www.fourwinns.com/locate-dealer.aspx|
|Document File Type|
|Wikipedia's Page||Outboard Marine Corporation|
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