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Mercury 25 Series User Manual

Mercury 25 Series
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INSTALLATION
48
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.
The propeller supplied with your outboard provides the best overall
performance under average operating conditions.
Alternative propellers are available for specific boating
requirements. See your outboard dealer.
AVAILABLE PROPELLERS
Light‑duty boat Heavy‑duty boat
Mark 14 (E) 13 (D) 11 (C) 10 (B) 9 (A) 8 (F)
Dimensions
(blade x
diameter x pitch)
mm
3 x 252 x
360
3 x 252 x
332
3 x 250 x
288
3 x 250 x
260
3 x 249 x
236
3 x 260 x
210
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 outboard's 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.

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Mercury 25 Series Specifications

General IconGeneral
BrandMercury
Model25 Series
CategoryEngine
LanguageEnglish

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