TROUBLESHOOTING
116
6LY3 Operation Manual
TROUBLESHOOTING CHART
Symptom
Probable Cause
Measure
Reference
Alarm indicators and
alarm sound come on in
the display during
operation.
Shift to low speed operation immediately, and check which indicator has come on
in the display. Stop the engine for inspection. If no abnormality is identified and
there is no problem with operation, return to the port at lowest speed and request
repairs.
•
Lube oil low pressure
alarm indicator comes
on.
•
Engine lube oil level is low.
•
Check lube oil level.
Add or replace.
•
Lube oil filter clogged.
•
Replace lube oil filter.
Replace lube oil.
•
Marine gear lube oil
pressure alarm
indicator comes on.
•
Marine gear lube oil is low.
•
Check the oil level and
supply. —
•
Coolant high
temperature alarm
indicator comes on.
•
Coolant/fresh water in coolant
tank is low.
•
Check coolant level
and replenish.
•
Insufficient seawater causing
temperature to rise.
•
Check seawater
system.
—
•
Contamination inside cooling
system.
•
See your authorized
Yanmar marine dealer
or distributor.
—
Faulty Warning Devices
Do not operate the engine if alarm devices are not repaired. Serious accidents may
result if difficulties are not spotted due to faulty alarm lamps.
(1) When switch is turned ON:
•
Alarm buzzer sounds.
•
Circuit broken.
Note: Alarm buzzer only sounds
when there is an abnormality.
•
See your authorized
Yanmar marine dealer
or distributor.
—
•
Alarm indicator comes
on.
•
Circuit broken.
Note: Alarm indicator only comes
on when there is an abnormality.
•
See your authorized
Yanmar marine dealer
or distributor.
—
(2) When the rocker switch returned to ON from START after engine starts:
•
Buzzer keeps on
sounding.
•
Sensor switches faulty - if
indicator does not come on.
•
Short-circuit - if indicator does
not come on.
•
See your authorized
Yanmar marine dealer
or distributor.
—
•
One of the alarm
indicators comes on.
•
Sensor switches engine faulty.
•
See your authorized
Yanmar marine dealer
or distributor.
—
•
Battery low charge
indicator comes on
during operation.
•
V-belt is loose or broken.
•
Replace V-belt; adjust
tension.
•
Battery defective.
•
Check battery fluid
level, specific gravity.
Replace.
•
Alternator power generation
failure.
•
See your authorized
Yanmar marine dealer
or distributor.
—
Back
Summary of Contents for 6LY3 series
Page 1: ...6LY3 series OPERATION MANUAL 6LY3 Operation Manual P N 0A1957 G0000 MARINE ENGINES Back ...
Page 28: ...SAFETY 20 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
Page 42: ...PRODUCT OVERVIEW 34 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
Page 80: ...ENGINE OPERATION 72 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
Page 122: ...PERIODIC MAINTENANCE 114 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
Page 126: ...TROUBLESHOOTING 118 6LY3 Operation Manual This Page Intentionally Left Blank Back ...
Page 134: ...President Yanmar Marine Int l Back ...
Page 135: ...President Yanmar Marine Int l Back ...
Page 136: ...EPA WARRANTY USA ONLY 126 This Page Intentionally Left Blank Back ...