Yanmar 3YM30E - SPECIFICATIONS

TROUBLESHOOTING
YM Series Operation Manual 77
12/05
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 consult authorized Yanmar Marine dealer or distributor.
Engine oil low pressure alarm
indicator lights
Engine oil level is low. Check engine oil level. Add or
replace as necessary.
See Checking the
Engine Oil on
page 32
.
Engine oil filter is clogged. Replace engine oil filter.
Replace engine oil.
See Changing the
Engine Oil on
page 61
.
Water in sail drive seal
indicator lights
Rubber sail drive seal is broken. Consult authorized Yanmar
Marine dealer or distributor.
-
Coolant high temperature
alarm lights
Coolant in coolant tank / heat
exchanger is low.
Check coolant level and refill.
See Checking and
Adding Coolant on
page 35
.
Insufficient seawater level causing
temperature to rise.
Check seawater system. -
Contamination inside cooling system. Consult authorized Yanmar
Marine dealer or distributor.
-
Faulty Warning Devices Do not operate the engine if alarm devices are not repaired. See you authorized Yanmar Marine
dealer or distributor. Serious accidents may result if abnormalities are not identified due to faulty
indicators or alarm.
Indicators Do Not Go On:
The tachometer does not turn
on, even though the power
switch is turned on
No electrical current available.
The battery switch is turned off, the
fuse (3 A) on the instrument panel is
burned out or the circuit is broken.
Consult authorized Yanmar
Marine dealer or distributor.
-
One of the indicators does
not go out
Sensor switch is faulty. Consult authorized Yanmar
Marine dealer or distributor.
-
Battery low charge indicator
does not go out during
operation
V-ribbed belt is loose or broken. Replace V-ribbed belt or
adjust tension.
See Checking and
Adjusting the
Alternator V-ribbed
belt Tension on
page 62
.
Battery is defective. Check battery fluid level,
specific gravity or replace
battery.
See Checking the
Battery Electrolyte
Level on page 60
.
Alternator power generation failure. Consult authorized Yanmar
Marine dealer or distributor.
-
Starting Failures:
Starter turns but engine does
not start
No fuel. Add fuel. Bleed fuel system.
See Filling the Fuel
Tank on page 29
and see
Bleeding
the Fuel System on
page 30
.
Fuel filter is clogged. Replace filter element.
See Replacing the
Fuel Filter Element
on page 68
.
Improper fuel. Replace with recommended
fuel.
See Diesel Fuel
Specifications on
page 26
.
Problem with fuel injection. Consult authorized Yanmar
Marine dealer or distributor.
-
Compression leakage from
intake / exhaust valve.
Consult authorized Yanmar
Marine dealer or distributor.
-
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