Regal 2000 ES Owner's Manual page 296

Chapter 8
ENGINE & STERN DRIVE
DIAGNOSTIC CHART
Problem
Stern Drive Groans
Excessive Vibration
Water In Oil / Power Trim /
Power Steering Fluid
7-4
Possible Cause
Not enough lubricant on drive sha or in
drive
Bad gimbal bearing due to water in
bellows
Poor engine alignment
Drive prop was grounded, bent, or
destroyed
Engine mounts loose / broken
Bad oil quality / type
Distributor cap / rotor corroded
Loose serpentine belt
Bad alignment
Could be any number of problems -
Contact your Regal dealer