Cobalt Digital Inc 272, Owner'S Manual

Page: 69 / 130

Cobalt_OM_preprint_shell.fm Page 1 Wednesday, March 1, 2006 5:39 AM
272 Owner’s Manual 3
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13
O
PERATING
I
NFORMATION
Trim
Boat trim while on plane is influenced by three
factors:
1. Load distribution
2. Drive unit trim
3. Trim tab position, if equipped
Determining best boat trim while underway takes
time. It is best to experiment with different drive and
tab trim combinations while taking note of the
condition.
Load Distribution
The performance of your Cobalt boat depends on
load weight and distribution.
Distribute weight evenly, from bow to stern, and
also from port to starboard.
Drive Unit Trim
Trim angle is the angular relationship between the
drive unit and the transom of the boat. Boat trim
while underway greatly affects the performance and
efficiency of your boat. For best results, the boat
should be on plane and trimmed to reduce the
amount of the boat’s hull in the water (known as
wetted surface). With less boat in the water, both
speed and fuel economy increase.
Continuous trim adjustment is required when
operating your boat to maintain maximum
performance and efficiency.
If the drive unit(s) are trimmed in too far (closer to
the boat bottom), speed drops, fuel economy
decreases and the boat may not handle correctly.
However, it does provide better acceleration from a
standstill; and because it forces the bow down,
visibility is improved. If the drive unit(s) are trimmed
out too far (away from the boat bottom), steering
torque may increase, the boat may be difficult to get
on plane, and it may bounce.
To use power trim effectively, start with the drive
unit(s) trimmed in. As the boat planes, increase the
angle out. Experience is the best teacher for
understanding proper drive trim.
CORRECT
IN TOO FAR
COB_0066_A
IN
OUT
12
34
5
6
7
8
UP
DN
OUT
UP
DN
OUT
UP
DN
12
34
5
6
7
8
UNITS TABS
IN
12
34
5
6
7
8
12
34
5
6
7
8
UNITS
TABS
IN
12
34
5
6
7
8
12
34
5
6
7
8
UNITS TABS
OUT TOO FAR