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Mercury 40 4-Stroke User Manual

Mercury 40 4-Stroke
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FEATURES & CONTROLS
33
Adjusting the outboard close to the boat transom can:
Lower the bow
Result in quicker planing off, especially with a heavy load or a stern heavy boat
Generally improve the ride in choppy water
Increase steering torque or pull to the right (with the normal right hand rotation propeller)
In excess can lower the bow of some boats to a point where 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:
Lift the bow out of the water
Generally increase top speed
Increase clearance over submerged objects or a shallow bottom
Increase steering torque or pull to the left at a normal installation height (with the normal right
hand rotation propeller)
In excess can cause boat porpoising (bouncing) or propeller ventilation
Throttle Grip Friction Adjustment - Tiller Handle Models
Throttle Grip Friction Knob - Turn friction knob to set and maintain the throttle at desired speed. Turn
knob clockwise to tighten friction and turn knob counterclockwise to loosen friction.
a
b
19807
a - Loosen friction b - Tighten friction
Steering Friction Adjustment
TILLER HANDLE MODELS
Steering Friction Adjustment - Adjust this lever to achieve the desired steering friction (drag) on the tiller
handle. Move lever to the left to tighten friction or move to the right to loosen friction.

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Mercury 40 4-Stroke Specifications

General IconGeneral
Engine Type4-Stroke
Horsepower40 hp
Cylinders3
Fuel Induction SystemElectronic Fuel Injection (EFI)
StartingElectric
Displacement747 cc
Shaft Length20 in
Dry Weight216 lbs
SteeringRemote
Alternator Amp18 amp / 226 watt
Full Throttle RPM5500 - 6000 RPM

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