25
Systems
Using trim tabs in conjunction with the power trim will
compensate for uneven weight distribution, listing, water
conditions, and other factors that cause inefficient
operation. Remember, that trim tabs are trimming the hull
while power trim is trimming the engine drive.
TRIM TAB
TRIM TAB DASH SWITCH
PORT ROCKER
STBD. ROCKER
Typical Trim Tabs
Trim tabs may be installed on the hull lower transom
area. Water is deflected and redirected as the trim tabs
are raised and lowered through the dash switches. This
change in water flow creates upper pressure under the
tabs, and raises the stern. When the stern rises, the bow
is lowered. Lowering the port tab will cause the port stern
to rise, making the starboard bow lower. Lowering the
starboard tab will cause the starboard stern to rise, making
the port bow lower.
Obtaining A Trimmed Postition
Your vessel will reach a planing position at a specific speed.
This speed is determined by bottom design, weight
distribution, water conditions, and on board equipment.
As the throttle is advanced the stern squats and the bow
rises initially. The trim tabs allow your boat to plane at a
slower speed than natural conditions allow.
In short bursts both trim tab rocker switches are pushed
simultaneously in the “bow down” position which causes
the trim tabs to move down. As the boat breaks over the
bow high attitude the boat speed accelerates and visibility
increases.
If the boat is overtrimed, it will plow the bow and the boat
will lose maneuverability. If this occurs, simply short burst
the “bow up” trim tab rocker switch simultaneously.
In the “learning curve” process, press the tab switches in
half second bursts. You will notice a slight delay from the
time the switches are pushed until the boat reacts depending
on vessel speed. You will know after awhile the optimum
planing angle and speed.
When running in heavy seas press the “bow down” position
which will assist the vessel to cut through the waves. This
will produce a drier and more comfortable ride. In a
following sea run the tabs in a fully retracted angle for
maximum outdrive response.
Sometimes you can watch the bow spray or stern wake
and the rooster tail (mound of water produced by stern
drives). In a bow up position the spray is far aft to the
hull, the wake is high and the rooster tail is high.
Summary of Contents for 30 EXPRESS
Page 1: ...30 EXPRESS OWNER S MANUAL...
Page 2: ...784022 OWNER S MANUAL 30 EXPRESS 12 2012...
Page 30: ...11 Safety On Board NAVIGATION LIGHT RULES...
Page 41: ...Chapter 2 22 Notes...
Page 44: ...3 Rules Of The Road NAVIGATION RULES...
Page 85: ...28 Chapter 5 Notes...
Page 105: ...4 Chapter 7...
Page 106: ...5 Equipment Operation...
Page 107: ...6 Chapter 7...
Page 108: ...7 Equipment Operation...
Page 109: ...8 Chapter 7...
Page 110: ...9 Equipment Operation...
Page 111: ...10 Chapter 7...
Page 117: ...16 Chapter 7...
Page 126: ...25 Equipment Operation ROTARY ENCODER AND MENU KEY...
Page 127: ...26 Chapter 7 USING THE ROTARY ENCODER AND MENU KEY...
Page 158: ...57 Equipment Operation BACKING A TRAILER 1 2 3 4 LAUNCHING RAMP...
Page 161: ...60 Chapter 7 Notes...
Page 195: ...34 Chapter 8 Notes...
Page 204: ...9 Troubleshooting TOILET SYSTEM DIAGNOSTIC CHART...
Page 209: ...14 Chapter 9...
Page 219: ...6 Chapter 11 Notes...
Page 221: ...2 Chapter 12...
Page 224: ...5 Technical Information 30 Express Deck Overview 30 Express Cabin Overview...
Page 225: ...Technical Information 12 6 30 EXPRESS...
Page 226: ...12 7 Technical Information 30 EXPRESS...
Page 227: ...Technical Information 12 8 30 EXPRESS...
Page 228: ...12 9 Technical Information 30 EXPRESS...
Page 229: ...Technical Information 12 10 30 EXPRESS 30 EXPRESS...
Page 230: ...12 11 Technical Information TYPICAL NEGATIVE GROUND SYSTEM...
Page 231: ...Technical Information 12 12 30 EXPRESS...
Page 232: ...12 13 Technical Information 30 EXPRESS...