JH Series Operation Manual
11
PRODUCT OVERVIEW
YANMAR 3/4JH COMMON
RAIL SERIES FEATURES
AND APPLICATIONS
The 3/4JH common rail series are
four-stroke diesel engines equipped with
direct injection common rail system and
with liquid coolant systems.
The 3JH40 is 3-cylinder and naturally
aspirated.
The 4JH45, 4JH57 are 4-cylinder and
naturally aspirated.
The 4JH80, 4JH110 are 4-cylinder and
turbocharged with an air cooler.
The engines are equipped with a marine
gear or sail drive unit.
These engines are designed for
recreational craft use.
Failure to do so can lead to reduced vessel
performance, lead to increased smoke
levels and cause permanent damage to
your engine.
The engine must be installed correctly with
coolant lines, exhaust gas lines and
electrical wiring. Any auxiliary equipment
attached to the engine should be easy to
use and accessible for service. To handle
the drive equipment, propulsion systems
(including the propeller) and other inboard
equipment, always observe the
instructions and cautions given in the
operation manuals supplied by the
shipyard and equipment manufacturers.
The 3/4JH common rail series engines are
designed to be operated at maximum
throttle
*1
for less than 5% of total engine
time (30 minutes out of every 10 hours)
and cruising speed
*2
.
The laws of some countries may require
hull and engine inspections, depending on
the use, size and cruising area of the boat.
The installation, fitting and surveying of
this engine all require specialized
knowledge and engineering skills.
See YANMARs local subsidiary in your
region or your authorized YANMAR Marine
dealer or distributor.
*1
maximum throttle: fuel stop power
engine speed
*2
cruising speed: fuel stop power
engine speed -200 min
-1
or less
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