Diagnostic
Cause: Reduced air density due to high elevation, high temperature, low barometric pressure, or high humidity — cannot be compensated by engine fuel or electronic management systems Test: Verify operating conditions; consider a different pitch propeller to partially recover performance loss
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Ask Boat Guru about thisSpec · Mercury or Quicksilver High Performance Gear Lubricant
Procedure · 1. The engine automatically compensates for high elevation changes. No manual adjustment is required. 2. Consider fitting a different pitch propeller to help reduce normal performance loss resulting from reduced oxyge...
Spec · >30% conditions={"elevation":"8,000 feet"}
Procedure · 1. Use an accurate tachometer to measure engine speed. 2. Choose a propeller that allows the engine to operate within the specified full throttle operating range. At full throttle under normal load, engine RPM should ...
Diagnostic · Cause: High elevation (over 8,000 ft) causing over 30% power loss, or hot and humid conditions causing up to 14% power loss