
TROUBLESHOOTING CHART
Symptom Probable Cause Measure Reference
Indicators light on the
instrument panel and
alarm sounds during
operation
Shift to low speed operation immediately, and check which indicator has come on.
Stop the engine and inspect. If no abnormality is identified and there is no problem
with operation, return to port at lowest speed and request repairs.
• Engine oil low
pressure alarm
indicator comes on
Engine oil level is low. Check engine oil level.
Add or replace.
See Checking
the Engine Oil on
page 31
Engine oil filter clogged. Replace engine oil filter.
Replace engine oil.
See Changing
the Engine Oil
and Replacing
the Engine Oil
Filter Element on
page 59
• Fresh water (coolant)
level alarm comes on
Coolant / fresh water in coolant
recovery tank is low.
Check coolant level and
refill.
See Checking
and Adding
Engine Coolant
on page 34
• Fresh water (coolant)
high temperature
alarm comes on
Coolant / fresh water in coolant
recovery tank is low.
Check coolant level and
refill.
See Checking
and Adding
Engine Coolant
on page 34
Leakage in fresh water cooling
system causing temperature to
rise.
See your authorized
Yanmar marine dealer or
distributor.
-
Contamination inside cooling
system.
See your authorized
Yanmar marine dealer or
distributor.
-
Fresh water cooling pump
damaged.
See your authorized
Yanmar marine dealer or
distributor.
• Gear oil alarm comes
on
Insufficient drive oil. Check oil level and refill. See Marine Drive
Oil on page 32
• Fuel filter alarm comes
on
Water level in fuel / water
separator too high.
Drain. See Draining
Fuel Filter /
Water Separator
on page 62
• Exhaust alarm comes
on
Insufficient discharge of cooling
seawater.
Check that seacock is open.
Damaged seawater pump.
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 abnormalities are not identified due to faulty indicators or alarm.
TROUBLESHOOTING
6LPA Series Operation Manual 73
© 2007 Yanmar Marine International
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