Yanmar 4LHA-STP User Manual

Trouble
OCharge lamp does
not go out
during operation
•Starting Failures
OStarter works
but engine does not
start
OStarter does not
work or works
only slowly, (eng.can
be turned manually)
OEngine can't be turned
manually
•Poor Exhaust Color
OBIack smoke
OWhite smoke
Probable Cause
V-belt broken or loose
Battery defective.
Alternator power
generation failure
No fuel
Improper fuel
Fuel injection faulty.
Compression leaks from
intake/exhaust valve.
Battery charging
insufficient.
Cable terminal contact
failure
Starter switch faulty.
Battery power lacking due
to other use.
Internal parts seized;
broken.
Load increased
Turbocharger blower
contaminated.
Fuel improper.
Faulty spraying by
F.O. injection valve
lnt./exh. valve head
clearance excessive
Improper fuel
Faulty spraying by
F.O. injection valve
F.O. injection timing lags
Lube oil burns;
excessive consumption
Measure
Reference
Replace V-belt; adjust 5.2.4(1)
tension
Check fluid level,
specific gravity;
replace.
5.2.2(4)
Ask for repairs.
Resupply fuel; bleed air.
Use recommended fuel.
Ask for repairs.
Ask for repairs.
Check fluid level;
re-charge; replace.
Remove rust from
terminal; retighten.
Ask for repairs.
Consult your dealer.
Ask for repairs.
Inspect propeller
system
Clean blower.
Use recommended fuel
Ask for repairs.
Use recommended fuel
Ask for repairs.
Ask for repairs.
Ask for repairs.
3.2.2
3.1.1
5.2.2(4\
3.1.1
3.1.1
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Yanmar 4LHA-STP Specifications

General

Number of Cylinders	4
Fuel System	Direct Injection
Engine Type	4-Stroke Vertical Water-Cooled Diesel Engine
Displacement	3.455 L
Bore x Stroke	100 mm x 110 mm
Aspiration	Turbocharged