Yanmar 3JH4E - Page 86

Symptom Probable Cause Measure Reference
• Battery low charge
indicator does not go
out during operation
V-belt is loose or broken. Replace V-belt or adjust
tension.
See Checking
and Adjusting the
Alternator V-Belt
Tension on page
62
Battery is defective. Check battery fluid level,
specific gravity or
replace battery.
See Checking
the Battery
Electrolyte Level
(Serviceable
Batteries Only)
on page 66
Alternator power generation
failure.
See your 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 30 and See
Bleeding the
Fuel System on
page 30
Fuel filter is clogged. Replace filter element. See Replacing
the Fuel Filter
Element on page
67
Improper fuel. Replace with
recommended fuel.
See Diesel Fuel
Specifications on
page 27
Problem with fuel injection. See your authorized
Yanmar marine dealer or
distributor.
-
Compression leakage
from intake / exhaust
valve.
See your authorized Yanmar
marine dealer or distributor.
-
• Starter does not turn or
turns slowly (engine
can be turned
manually)
Faulty clutch position. Shift to NEUTRAL and
start.
-
Insufficient battery charge. Check fluid level.
Recharge. Replace.
See Checking
the Battery
Electrolyte Level
(Serviceable
Batteries Only)
on page 66
Cable terminal contact failure. Remove corrosion from
terminals. Tighten
battery cables.
-
Faulty safety switch device. See your authorized
Yanmar marine dealer or
distributor.
-
Faulty starter switch. See your authorized
Yanmar marine dealer or
distributor.
-
Power lacking due to
accessory drive being
engaged.
See your authorized Yanmar
marine dealer or distributor.
-
• Engine cannot be
turned manually
Internal parts seized. See your authorized
Yanmar marine dealer or
distributor.
-
TROUBLESHOOTING
80 JH4 Series Operation Manual