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Mercury 25 4-Stroke User Manual

Mercury 25 4-Stroke
72 pages
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INSTALLATION
20
ob00605
a
b
c
d
a
a - Clamp screws
b - Mounting bolt and locknut (2)
c - Outboard Mounting Kit (part number
812432A5)
d - Retainer screws
Propeller Selection
For best all around performance from your outboard/boat combination, select a propeller that allows the engine to
operate in the upper half of the recommended full throttle RPM range with the boat normally loaded (refer to General
Information - Specifications). This RPM range allows for better acceleration while maintaining maximum boat
speed.
ob00323
If changing conditions cause the RPM to drop below the recommended range, such as warmer, more humid
weather, operation at higher elevations, increased boat load, or a dirty boat bottom/gearcase, a propeller change
or cleaning may be required to maintain performance and ensure the outboards durability.
Check full-throttle RPM, using an accurate tachometer, with the engine trimmed out to a balanced-steering
condition (steering effort equal in both directions) without causing the propeller to break loose.

Table of Contents

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Mercury 25 4-Stroke Specifications

General IconGeneral
Engine Type4-Stroke
Horsepower25 hp
Cylinders2
Fuel Induction SystemElectronic Fuel Injection (EFI)
Full Throttle RPM Range5000-6000 RPM
Starting SystemElectric
SteeringRemote or Tiller
Shaft Length15 in / 20 in
Dry Weight157 lbs
Fuel Tank CapacityExternal
Oil Capacity1.5 L (with filter)

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