Yanmar 3YM30E - ENGINE AND MARINE GEAR SPECIFICATIONS

TROUBLESHOOTING
78 YM Series Operation Manual
Starter does not turn or turns
slowly (engine can be turned
manually)
Faulty clutch position. Shift to NEUTRAL and start. See If the Engine
Fails to Start on
page 42
.
Insufficient battery charge. Check fluid level. Recharge
or replace battery.
See Checking the
Battery Electrolyte
Level on page 60
.
Cable terminal contact failure. Remove corrosion from
terminals. Tighten battery
cables.
-
Faulty safety switch device. Consult authorized Yanmar
Marine dealer or distributor.
-
Faulty starter switch. Consult authorized Yanmar
Marine dealer or distributor.
-
Power lacking due to accessory drive
being engaged.
Consult authorized Yanmar
Marine dealer or distributor.
-
Engine cannot be turned
manually
Internal parts seized. Consult authorized Yanmar
Marine dealer or distributor.
-
Abnormal Exhaust Color:
Black smoke Load increased. Consult authorized Yanmar
Marine dealer or distributor.
-
Improper propeller matching. Consult authorized Yanmar
Marine dealer or distributor.
-
Dirty intake silencer (air cleaner). Clean element.
See Cleaning the
Intake Silencer (Air
Cleaner) Element
on page 70
.
Improper fuel. Replace with recommended
fuel.
See Diesel Fuel
Specifications on
page 26
.
Faulty spraying of fuel injector. Consult authorized Yanmar
Marine dealer or distributor.
-
Incorrect intake / exhaust valve
clearance.
Consult authorized Yanmar
Marine dealer or distributor.
-
White smoke Improper fuel. Replace with recommended
fuel.
See Diesel Fuel
Specifications on
page 26
.
Faulty spraying of fuel injector. Consult authorized Yanmar
Marine dealer or distributor.
-
Fuel injection timing off. Consult authorized Yanmar
Marine dealer or distributor.
-
Excessive diesel fuel consumption. Consult authorized Yanmar
Marine dealer or distributor.
-
Symptom Probable Cause Measure Reference
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