™
It is possible to extend the cylinder life expectancy on
your trim tabs. To do this, keep the cylinders retracted
while at dockside. Press both trim tab controls down
until tabs reach their full up position.
lightly loaded and the drive trimmed up to maxi-
mum. This configuration allows the engine to oper-
atewithintherecommendedrpmrangewithaheavy
load.
The power unit should never be trimmed up to a
point where the propeller cavitates (or slips). Arapid
increase in engine rpm’s is evidence of cavitation.
If this occurs accidentally while running at full
throttle, immediately lower the drive trim and re-
duce the throttle until the slipping stops. If neces-
sary, have your dealer reset the trim limit switch (if
provided) to avoid overtrimming in the future.
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 effi-
ciency.
Figure T1: Trimming the Boat with Trim Tabs
7. Trimming out, in addition to raising the bow, also
lifts the boat higher, gaining speed because less
hull is in the water.
B. Tilt/Trim Control Switches - Stern Drive Models
Only
8.
The trailering position of some stern drives is con-
trolled by a separate switch on the dash switch
panel or throttle/shift control. Do not activate this
switch while engine is running. Doing so can
severely damage the lower unit and engine.
NOTE: Trim refers to the angle of the lower unit in rela-
tion 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.
1.
2.
3.
The standard trim control switch is located on the
control lever handle.
NOTE: Refer to the control instructions regarding the
power trim controls installed on your boat.
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 T2. The lower unit is trimmed
too far under or forward. Trim the unit UP (out) to
correct this situation.
4.
5.
If the bow is too high, the boat tends to “porpoise”
(Figure T4). 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.
6.
Trim also affects propeller selection and fuel effi-
ciency. All models should be “propped” to be in the
upper half of the maximum rpm range with the boat
Figures T2-T4: Trimming the Boat with Outdrive
Vista™ Owner’s Manual
Section T
Page6
| Categories | Four Winns Manuals, Four Winns Vista Manuals, Outboard Marine Corporation Manuals |
|---|---|
| Tags | Four Winns Vista 248, Four Winns Vista 268, Four Winns Vista 288, Four Winns Vista 298, Four Winns Vista 328, Four Winns Vista 348 |
| Model Year | 2004, 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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