Engine Over-Speed Limiter; Power Trim And Tilt (If Equipped) - Mercury Sea Pro User Manual

Engine Over-Speed Limiter

The outboard is equipped with an engine over-speed limiter which limits the engine maximum RPM. This will protect
the engine from mechanical damage.
Some causes of engine over-speed are as follows:
• Propeller ventilation.
• A propeller which has an incorrect pitch or diameter.
• Propeller hub slippage.
• Outboard mounted too high on the transom.
• Tilting the outboard out beyond a vertical position.
• Cavitation of the propeller due to rough water or obstruction in the boat hull.
When the engine over-speed limiter is activated, the engine timing will be momentarily retarded to decrease the
engine speed. Excessive over-speed (above 5700 RPM) will result in cutout of the cylinders ignition to prevent
operation above this limit.

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. 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 20° range of travel. 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. 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.
a
a - Trim switch
b - Tilt range of travel
FEATURES & CONTROLS
a
3103
c
b
c - Trim range of travel
28
3122