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If full throttle operation is below the recommended range, the
propeller must be changed to prevent loss of performance and
possible engine damage. On the other hand, operating an engine
above the recommended operating rpm range will cause higher than
normal wear and/or damage.
After initial propeller selection, the following common problems may
require that the propeller be changed to a lower pitch.
• Warmer weather and greater humidity cause a loss of rpm.
• Operating in a higher elevation causes a loss of rpm.
• Operating with a damaged propeller or dirty boat bottom causes
a loss of rpm.
• Operating with increased load (additional passengers, pulling
skiers) causes a loss or rpm.
For better acceleration, such as is needed for water skiing, use the
next lower pitch propeller. Do not operate at full throttle when using
the lower pitch propeller but not pulling skiers.
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