42C System Operations - 67
TRIM TAB SYSTEM
The purpose of the Trim Tab System on
your 42C is to assist in reaching planing
speed as soon as possible and to main-
tain a proper “running attitude” while in for-
ward motion. “Running Attitude” is de
fi
ned
as the level of the boat, both fore and aft
and athwartships, while the vessel is un-
derway. Your yacht, upon reaching plan-
ing speed, should rise slightly in the bow
and should not list to either side for the
greatest stability and fuel economy. Your
42C is equipped with two (2) Bennett Trim
Tabs, each measuring 12” x 24”, which
are mounted on the trailing edge of the
transom (See photographs below, which
illustrate the location of the Starboard trim
tab).
Each trim tab operates independently
of each other and they are controlled by
separate rocker-type switches located on
the Helm Switch Panel (Refer to the Elec-
trical Pages in this section of this Owner’s
Manual for the location of these switches).
Each trim tab is actuated by a hydraulic
cylinder, which moves them in an Up or
Down motion.
The position as determined by depressing
the rocker-type switches as follows:
• Depressing the TOP of the switch
lowers the trim tab.
• Depressing the BOTTOM of the
switch raises the trim tab.
The
Trim Tab System
operates in the fol-
lowing manner:
The function of the trim tab is to redirect
the
fl
ow of water beyond the bottom of the
transom. This creates an upward pressure
on the hull bottom at the transom, which
results in lowering the bow.
When the Port trim tab is lowered, the
Port stern section is raised, which in turn
lowers the Starboard side of the bow.
When the Starboard trim tab is lowered,
the Starboard stern section is raised,
which in turn lowers the Port side of the
bow.
Both trim tabs should be lowered/raised
as needed to maintain a proper “Running
Attitude”.
Operation of the Trim Tab System may
require practice to attain a level of
pro
fi
ciency. DO NOT operate either trim
tab to its extreme lowered position sud-
denly. This may cause the bow to lower
to an unsafe position while heading
into or away from waves, which may
cause “swamping” of your yacht, re-
sulting in possible injury or death. DO
operate the trim tab switches with short
“bursts” until the desired “Running At-
titude” is obtained.
Summary of Contents for 42 C
Page 1: ......
Page 6: ...INTRODUCTION 6...
Page 8: ...INTRODUCTION 8...
Page 12: ...INTRODUCTION 12...
Page 25: ...42C Getting Familiar 5 DECK...
Page 28: ...42C Getting Familiar 8...
Page 32: ...42C Getting Familiar 12...
Page 34: ...42C Getting Familiar 14...
Page 39: ...42C Getting Familiar 19 ENGINE COMPARTMENT...
Page 58: ...SAFETY 18...
Page 64: ...42C System Operations 6...
Page 66: ...42C System Operations 8...
Page 84: ...42C System Operations 26...
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Page 150: ...OPERATION 6...
Page 158: ...GLOSSARY 6...
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Page 161: ...GLOSSARY 9 MAINTENANCE LOG DATE MAINTENANCE PERFORMED HOURMETER...
Page 162: ...GLOSSARY 10 MAINTENANCE LOG DATE MAINTENANCE PERFORMED HOURMETER...
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