WARNING
Piercing Hazard
Avoid skin contact with high-
pressure diesel fuel spray
caused by a fuel system leak
such as a broken fuel injection
line. High-pressure fuel can
penetrate your skin and result in serious
injury. If you are exposed to high-pressure
fuel spray, obtain prompt medical treatment.
NEVER check for a fuel leak with your
hands. ALWAYS use a piece of wood or
cardboard. Have your authorized Yanmar
marine dealer or distributor repair the
damage.
Burn Hazard
Avoid serious injury. Some of
the engine surfaces become
very hot during operation and
shortly after shut-down. Keep
hands and other body parts
away from hot engine
surfaces.
Sudden Movement Hazard
Avoid personal injury. ALWAYS stop the
engine before beginning service.
Exhaust Hazard
Avoid serious injury or death.
NEVER block windows, vents
or other means of ventilation if
the engine is operating in an
enclosed area. All internal
combustion engines create carbon
monoxide gas during operation and special
precautions are required to avoid carbon
monoxide poisoning.
CAUTION
The safety messages that follow have
CAUTION level hazards.
Poor Lighting Hazard
Avoid personal injury or equipment damage.
Ensure that the work area is adequately
illuminated. ALWAYS install wire cages on
portable safety lamps.
Tool Hazard
Avoid personal injury or equipment damage.
ALWAYS use tools appropriate for the task
at hand and use the correct size tool for
loosening or tightening machine parts.
Flying Object Hazard
Avoid personal injury. ALWAYS wear eye
protection when servicing the engine or
when using compressed air or high-
pressure water. Dust, flying debris,
compressed air, pressurized water or steam
may injure your eyes.
Coolant Hazard
Wear eye protection and
rubber gloves when you
handle Long Life engine
coolant. If contact with the
eyes or skin should occur,
flush eyes and wash immediately with clean
water.
SAFETY
6 JH4 Series Operation Manual
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