Power Trim And Tilt (If Equipped) - Mercury 25 Manual

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FEATURES & CONTROLS
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MANUAL TILT SYSTEM – REMOTE CONTROL MODELS
WITHOUT POWER TRIM
Setting the operation angle of your outboard
The vertical operating angle of your outboard is adjusted by changing the position
of the tilt pin (a) in the five adjustment holes provided. Proper adjustment allows
the boat to run stable, achieve optimum performance, and minimize steering effort.
Note: Refer to lists on the following page when adjusting the operating angle of
your outboard.
The tilt pin should be adjusted so the outboard is positioned to run perpendicular
to the water when the boat is running at full speed. This allows the boat to be driven
parallel to the water.
Arrange passengers and load in the boat so the weight is distributed evenly.
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Too Much Angle (Stern Down – Bow Up)
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Not Enough Angle (Stern Up – Bow Down)
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Angle Adjusted Properly (Bow Slightly Up)
Setting the operation angle of your outboard
Consider the following lists carefully when adjusting the operating angle of your
outboard.
Adjusting the outboard close to the boat transom can:
1. Lower the bow.
2. Result in quicker planing off, especially with a heavy load or a stern heavy boat.
3. Generally improve the ride in choppy water.
4. Increase steering torque or pull to the right (with the normal right hand rotation
propeller).
5. In excess, lower the bow of some boats to a point at which they begin to plow
with their bow in the water while on plane. This can result in an unexpected turn
in either direction (called "bow steering" or "over-steering") if any turn is
attempted, or if a significant wave is encountered.
Adjusting the outboard away from the boat transom can:
1. Lift the bow out of the water.
2. Generally increase top speed.
3. Increase clearance over submerged objects or a shallow bottom.
4. Increase steering torque or pull to the left at a normal installation height (with
the normal right hand rotation propeller).
5. In excess, cause boat "porpoising" (bouncing) or propeller ventilation.
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POWER TRIM AND TILT (IF EQUIPPED)

Your outboard has a trim/tilt control called "Power Trim." This enables the operator
to easily adjust the position of the outboard by pressing the trim switch (a). Moving
the outboard in closer to the boat transom is called trimming "in" or "down." Moving
the outboard further away from the boat transom is called trimming "out" or "up."
The term "trim" generally refers to the adjustment of the outboard within the first
205 range of travel (b). This is the range used while operating your boat on plane.
The term "tilt" is generally used when referring to adjusting the outboard further up
out of the water (c). With the engine turned off, the outboard can be tilted out of the
water. At low idle speed, the outboard can also be tilted up past the trim range to
permit, for example, shallow water operation.
Power Trim Operation
With most boats, operating around the middle of the "trim" range will give
satisfactory results. However, to take full advantage of the trimming capability
there may be times when you choose to trim your outboard all the way in or out.
Along with an improvement in some performance aspects comes a greater
responsibility for the operator, and this is being aware of some potential control
hazards.
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POWER TRIM AND TILT (CONTINUED)
Power Trim Operation (continued)
The most significant control hazard is a pull or "torque" that can be felt on the
steering wheel or tiller handle. This steering torque results from the outboard being
trimmed so that the propeller shaft is not parallel to the water surface.
Avoid possible serious injury or death. When the outboard is trimmed in
or out beyond a neutral steering condition, a pull on the steering wheel
or tiller handle in either direction may result. Failure to keep a continuous
firm grip on the steering wheel or tiller handle when this condition exists
can result in loss of boat control as the outboard can turn freely. The boat
can now "spin out" or go into a very tight maximum turn which, if unex-
pected, can result in occupants being thrown within the boat or out of the
boat.
Consider the following lists carefully.
Trimming In or Down Can:
1. Lower the bow.
2. Result in quicker planing off, especially with a heavy load or a stern heavy boat.
3. Generally improve the ride in choppy water.
4. Increase steering torque or pull to the right (with the normal right hand rotation
propeller).
5. In excess, lower the bow of some boats to a point at which they begin to plow
with their bow in the water while on plane. This can result in an unexpected turn
in either direction (called "bow-steering" or "over-steering") if any turn is
attempted, or if a significant wave is encountered.
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WARNING
90-10183R30