
Troubleshooting
8-3
PERFORMANCE DIAGNOSTIC CHART
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Excessive vibration
Material obstructing
propeller
Bent propeller shaft
Bent propeller blade
Propeller hub slipping
Remove material by
reversing engine
Call Regal dealer
Repair/replace propeller
Replace propeller
Poor performance
Engine trim incorrect
Uneven load
distribution
Engine problem
Adjust trim
Adjust boat load
Call Regal dealer
FUEL SYSTEM DIAGNOSTIC CHART
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Engine won't start or
not running right
Fuel tank vent
obstructed
Fuel line blocked
Lack of fuel
Water in fuel
Clogged fuel filter
No fuel reaching engine
Clean vent hose or and
fitting. Check for kinks.
Check for kinked hose
Clean filter. Check for
clogged anti-siphon
valve
Eliminate water
Replace filter element
Check fuel pump output.
Clean filters. Check fuel
tank gauge level.
Troubleshooting
8-3
PERFORMANCE DIAGNOSTIC CHART
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Excessive vibration
Material obstructing
propeller
Bent propeller shaft
Bent propeller blade
Propeller hub slipping
Remove material by
reversing engine
Call Regal dealer
Repair/replace propeller
Replace propeller
Poor performance
Engine trim incorrect
Uneven load
distribution
Engine problem
Adjust trim
Adjust boat load
Call Regal dealer
FUEL SYSTEM DIAGNOSTIC CHART
PROBLEM POSSIBLE CAUSE POSSIBLE FIX
Engine won't start or
not running right
Fuel tank vent
obstructed
Fuel line blocked
Lack of fuel
Water in fuel
Clogged fuel filter
No fuel reaching engine
Clean vent hose or and
fitting. Check for kinks.
Check for kinked hose
Clean filter. Check for
clogged anti-siphon
valve
Eliminate water
Replace filter element
Check fuel pump output.
Clean filters. Check fuel
tank gauge level.
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