Section 7
7-6
Cruiser
Rotational thrust of the propeller is an aspect
most propeller-driven boats share and needs to
be compensated for at slow speeds. During
rotational thrust, torque is transmitted to the helm
and may cause your boat to drift either port or
starboard when moving forward at a slow speed.
Rotational thrust usually goes unnoticed at high
speeds. While moving forward at a slow speed,
constant helm corrections are usually necessary
to maintain a straight course.
Twin-engine boats usually compensate for
rotational thrust of the propellers by using one
counterrotating drive with a counterrotating
propeller, and one standard clockwise-rotating
drive and propeller to reduce the effects of
steering torque at all boat speeds.
Figure 7-5
Figure 7-6
Twin-Engine Steering
When maneuvering with twin engines at low
speeds, steer using the independent thrust of the
port and starboard drives in conjunction with helm
movements. Steering in this manner can be very
effective, especially when maneuvering in
restricted areas and when docking.
Practice using the throttles to control steering of
your boat. Practice these maneuvers in open
water away from others before attempting them
near docks or other boats.
• Before attempting to make close turns at low
speed, always position the throttles in IDLE.
• Reverse the direction of the engine on the side
you want to turn. If you want to turn starboard,
for example, shift the starboard engine into
REVERSE. The forward speed of the port
engine, along with the reverse rotation of the
starboard engine, will pivot your boat into a
starboard turn.
• Use quick “bursts” of throttle to control your
boat. Keep in mind that once your boat starts to
move, momentum will carry it through.
Figure 7-6
Figure 7-7
A boat does not have brakes. Controlling your
boat to a stop and while stopped are important
skills that must be learned. Reverse thrust is
commonly used to slow and stop a boat. The
continued momentum of a boat will vary
according to the boat design, load and speed.
You must also consider and learn to compensate
for the effects of wind and current. Stopping in
wind or water currents is difficult and requires skill
to be able to anticipate and compensate for these
effects.
• To stop or slow forward motion, always
gradually return the throttle(s) to the slow IDLE
position, pause and shift into NEUTRAL, then
pause and shift into REVERSE.
WARNING!
Always gradually return the throttle(s) to the
slow IDLE position. Failure to do so can
cause loss of boat control, personal injury
or death, and engine propulsion system
damage.
• If your boat has been driven for a long period of
time at high speed, allow the engine a two- to
three-minute cool-down period at low idle in
NEUTRAL.
KC-0059-A
STARBOARD TURN
SLOWER PROP
PORT TURN
SLOWER PROP
KC-0028-A
Summary of Contents for Sport Cruiser 260SCR
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Page 94: ...Boat Features and Options Cruiser 8 27 260SCR Cockpit Figure 8 15...
Page 95: ...Section 8 8 28 Cruiser 260SCR Interior Cabin Figure 8 16...
Page 96: ...Boat Features and Options Cruiser 8 29 260SCR Exterior Figure 8 17...
Page 97: ...Section 8 8 30 Cruiser 260SCR 280SCR Helm Figure 8 18...
Page 98: ...Boat Features and Options Cruiser 8 31 260SCR 280SCR Electrical Figure 8 19...
Page 99: ...Section 8 8 32 Cruiser 260SCR 280SCR Engine Room Figure 8 20...
Page 100: ...Boat Features and Options Cruiser 8 33 280SCR Cockpit Figure 8 21...
Page 101: ...Section 8 8 34 Cruiser 280SCR Interior Cabin Figure 8 22...
Page 102: ...Boat Features and Options Cruiser 8 35 280SCR Exterior Figure 8 23...
Page 103: ...Section 8 8 36 Cruiser 300SCR Cockpit Helm Figure 8 24...
Page 106: ...Boat Features and Options Cruiser 8 39 300SCR Interior Figure 8 27...
Page 107: ...Section 8 8 40 Cruiser 300SCR Interior Figure 8 28 Q...
Page 108: ...Boat Features and Options Cruiser 8 41 300SCR Exterior Figure 8 29...
Page 109: ...Section 8 8 42 Cruiser 300SCR Engine Room Figure 8 30...
Page 110: ...Boat Features and Options Cruiser 8 43 328SS Bow Cockpit Figure 8 31...
Page 111: ...Section 8 8 44 Cruiser 328SS Cockpit Figure 8 32...
Page 112: ...Boat Features and Options Cruiser 8 45 328SS Helm Figure 8 33...
Page 113: ...Section 8 8 46 Cruiser 328SS Helm Figure 8 34...
Page 114: ...Boat Features and Options Cruiser 8 47 328SS Interior Cabin Figure 8 35...
Page 115: ...Section 8 8 48 Cruiser 328SS Head Figure 8 36...
Page 116: ...Boat Features and Options Cruiser 8 49 328SS Exterior Figure 8 37...
Page 117: ...Section 8 8 50 Cruiser 328SS Electrical Figure 8 38...
Page 118: ...Boat Features and Options Cruiser 8 51 328SS Engine Figure 8 39...
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Page 169: ...Section 13 13 22 Cruiser 300SCR 220V AC Panel Figure 13 22...
Page 175: ...Section 13 13 28 Cruiser 300SCR Port Switch Panel Figure 13 28...
Page 176: ...Wiring Diagrams Cruiser 13 29 300SCR Starboard Switch Panel Figure 13 29...
Page 177: ...Section 13 13 30 Cruiser 300SCR Breaker Panel Figure 13 30...
Page 185: ...Section 13 13 38 Cruiser 328SS Twin MERC DTS Battery Wiring Diagram Figure 13 36...
Page 186: ...Wiring Diagrams Cruiser 13 39 328SS Twin Volvo EVC Battery Wiring Diagram Figure 13 37...
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