8
Chapter 9
PERFORMANCE DIAGNOSTICS
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Excessive vibration Material obstructing propeller Reverse engines to remove material
Bent drive propeller shaft Call authorized Regal/Volvo dealer
Bent propeller blade Repair/replace propeller
Noisy drive bearing Repair drive unit
Damaged drive casting Replace damaged casting
Poor performance Trim incorrect Adjust trim
Unbalanced load Adjust load
Engine problem Call authorized Regal/Volvo dealer
Engine speed/rpm is low Growth on hull Hoist vessel; clean bottom
Poor quality fuel Call authorized Regal/Volvo dealer
Accumulation of bilge water Check for leaks
Trim tab in “up” position Check trim tab functions/pump fl uid
levels
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