JH Series Operation Manual 15
PRODUCT OVERVIEW
YANMAR JH SERIES
FEATURES AND
APPLICATIONS
The JH series are four-stroke direct
injection diesel engines equipped with
liquid coolant systems.
The 3JH5E is 3-cylinder and naturally
aspirated.
The 4JH5E is 4-cylinder and naturally
aspirated.
The 4JH4–TE is 4-cylinder and
turbocharged.
The 4JH4–HTE1, 4JH4–HTE is 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 pleasure
craft use.
It is recommended that new vessels be
propped so the engines can operate at 100
to 200 min
-1
above the fuel stop power
engine speed to allow for some added
weight and hull resistance.
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 JH series engines are designed to be
operated at maximum throttle
(3000 to 3200 min
-1
) for less than 5% of
total engine time (30 minutes out of every
10 hours) and cruising speed (2800 min
-1
or less).
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.
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