Section 3 - On The Water
Page 34
90-899883179 OCTOBER 2007
Drive Unit Impact Protection
The power trim hydraulic system is designed to provide impact protection for the sterndrive
unit. If a submerged object is struck while the boat is moving forward, the hydraulic system
will cushion the kickup of the sterndrive unit as it clears the object, reducing damage to the
unit. After the sterndrive unit has cleared the object, the hydraulic system allows the
sterndrive unit to return to its original operating position, preventing loss of steering control
and engine overspeed.
Use extreme caution when operating in shallow water or where underwater objects are
known to be present. No impact protection is provided in reverse; use extreme care to
prevent striking submerged objects while operating in reverse.
IMPORTANT: Impact protection system cannot be designed to ensure total protection from
impact damage under all conditions.
Operating with Low Water Inlets in Shallow Water
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Low Water Inlets
NOTICE
Operating in shallow water can cause severe engine damage due to clogged water inlets.
Ensure that the water inlets on the gearcase do not ingest sand, silt, or other debris, which
can restrict or stop cooling water supply to the engine.
Extreme care should be exercised when operating a boat equipped with low water inlets
while maneuvering in shallow water. Also, avoid beaching a boat with the engine operating.
Conditions Affecting Operation
Weight Distribution (Passengers and Gear) Inside the Boat
Shifting weight to rear (stern):
• Generally increases speed and engine RPM
• Causes bow to bounce in choppy water
• Increases danger of following wave splashing into the boat when coming off plane
• At extremes, can cause the boat to porpoise
Shifting weight to front (bow):
• Improves ease of planing
• Improves rough water ride
• At extremes, can cause the boat to veer back and forth (bow steer)
The Bottom of the Boat
To maintain maximum speed, the boat bottom should be:
Summary of Contents for MerCruiser 4.3 TKS
Page 8: ...Page iv 90 899883179 OCTOBER 2007...
Page 20: ...Section 1 Warranty Notes Page 12 90 899883179 OCTOBER 2007...
Page 46: ...Section 3 On The Water Notes Page 38 90 899883179 OCTOBER 2007...
Page 92: ...Section 5 Maintenance Notes Page 84 90 899883179 OCTOBER 2007...
Page 114: ...Section 6 Storage Notes Page 106 90 899883179 OCTOBER 2007...
