™
378
as the “hump”. Because visibility, handling, and perfor-
mance are reduced, it is advisable to get “over the
hump” as soon as possible.Afew seconds at full throttle
should get the boat over the hump and into its planing
attitude.
Head Seas
Use tabs to keep bow down
and go at a slower speed.
Following Seas To prevent taking seawater
over
After getting over the hump, accelerate until reaching
a comfortable plane, then throttle down to cruising
speed. This also will provide for better fuel efficiency.
the bow, keep tabs up to keep
bow up.
Listing Due to
Use tabs independently to
S - 7
TRIMMING YOUR BOAT
Quartering Seas, adjust for list. If listing to star-
Beam Wind, or board, press port bow down
Trim tabs are used to add lift to the boat’s stern, thereby
changing the boat’s attitude (see Figure S1). This lift
can help the boat get on plane faster and remain on
plane at slower speeds than if no tabs were used. Used
independently, tabs can also correct listing conditions
caused by crosswinds, unbalanced loading and quar-
tering seas. Trimming your inboard boat properly in-
volves setting the trim tabs.
Uneven Load
switch. If listing to port, press
starboard bow down switch.
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 re-
act. 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.
When you are sitting dead in the water, your trim tab
switches are in the BOW UP position. Accelerate until
you get onto plane.At this point your boat will be plow-
ing through the water with the bow down too far. Trim
the tabs down slightly until the bow comes up. If you
trim the tabs down too far, the propeller will cavitate.
Your boat is trimmed correctly when it is just short of
propeller cavitation, under ideal running conditions.
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.
Trim your boat to compensate for seas, winds, or un-
even loads.
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.
Figure S1: Trimming the Boat with Trim Tabs
378
Vista™ Owner’s Manual
Section S
Page 5
| 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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