Mercury 200 Verado Manual page 24

INSTALLATION
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.
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