Remember that most boats react very slowly to trim
tabs. Often boat owners do not give trim tabs time to
work. Press the trim tab switches for only one second
at a time and then allow some time for the boat to react.
If the boat is still listing after a minute or two, press the
trim tab switch again for a one second interval. The
labels on the trim tab switches indicate what you want
your boat to do, not what you want the tabs to do.
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.
It is a good idea to take your boat out onto open water
shortly after you get it and experiment with the trim
tabs. After you get your boat onto plane, set the tabs in
various positions and note how your boat reacts. This
will give you a feel for how the trim tabs work.
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-
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.
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
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 trim-
ming, 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.
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
too far under or forward. Trim the unit UP (out) to
correct this situation.
Causes boat to "plow"
If the bow is too high, the boat tends to “porpoise”
(Figure T5). 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.
Gives maximum performance
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
lightly loaded and the drive trimmed up to maxi-
mum. This configuration allows the engine to oper-
Causes boat to "porpoise"
Figures T3-T5: Trimming the Boat with Outdrive
Sundowner™ Owner’s Manual
|Categories||Four Winns Manuals, Four Winns Sundowner Manuals, Outboard Marine Corporation Manuals|
|Tags||Four Winns Sundowner 205, Four Winns Sundowner 225, Four Winns Sundowner 245, Four Winns Sundowner 285|
|Model Year||2003, 2004, 2005, 2006, 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|
(1 votes, average: 3 out of 3) Marine readers have rated 2003-2008 Four Winns Sundowner 205 225 245 285 Boat Owners Manual 3.0 out of 3.0 based on 1 product reviews.