Engine Over-Speed Limiter (All Models); Power Trim And Tilt (If Equipped) - Mercury 60 Manual

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FEATURES & CONTROLS
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WARNING SYSTEM
If a steady stream of water (a) is coming out of the water pump indicator hole, and
the warning horn continues to sound, there still may be insufficient cooling water
or an engine problem. Stop engine and have it checked by your dealer. Operating
the engine while overheated will cause engine damage. See the following note.
Note: Should this occur and you are in a stranded situation, stopping the engine
and allowing it to cool back down will usually allow some additional low speed (idle)
running time before the engine starts to overheat again.
The overheat problem must be corrected before you can resume normal
operation.
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Low oil level in the oil injection system. If the oil level drops below the sight
gauge in the cowl when the outboard is setting in a vertical position , the
warning horn will sound. You still have an oil reserve remaining for 30 minutes
of full speed operation. Refer to Fuel Section for refilling instructions.
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ENGINE OVER-SPEED LIMITER (ALL MODELS)

The outboard is equipped with an engine over-speed limiter which limits the engine
maximum RPM. This will protect the engine from mechanical damage.
Engine over-speed may be caused by propeller ventilation, a propeller which has
an incorrect pitch or diameter, propeller hub slippage, or incorrect engine mounting
height.
When the engine over-speed limiter is activated, it will reduce ignition voltage to
momentarily decrease the engine speed. Excessive over-speed (above 5700
RPM) will result in cutout of the cylinders to prevent operation above this limit.
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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.
90-10122R30
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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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POWER TRIM AND TILT (CONTINUED)
Power Trim Operation (continued)
Avoid possible serious injury or death. Adjust outboard to an intermedi-
ate trim position as soon as boat is on plane to avoid possible ejection
due to boat spin-out. Do not attempt to turn boat when on plane if out-
board is trimmed extremely in or down and there is a pull on the steering
wheel or tiller handle.
6. In rare circumstances, the owner may decide to limit the trim in. This can be
accomplished by purchasing a stainless steel tilt pin (Part Number
17-49930A1) from your dealer and inserting it in whatever adjustment hole in
the transom brackets is desired. The non-stainless steel shipping bolt should
not be used in this application other than on a temporary basis.
Trimming Out or Up can:
1. Lift the bow higher 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.
6. Cause engine overheating if any cooling water intake holes are above the
water line.
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WARNING
WARNING
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