2.1 USE, DRIVING SYSTEM, ETC.
This is a light, compact diesel engine for use in pleasure boats. The engine is equipped with
a turbocharger and intercooler which insures maximum output while preserving lightness
and compact size. (The 4JH3-TE series is equipped with the turbocharger only.)
Power output for this group of engines increases progressively from 4JH3-TE, 4JH3-HTE to
4JH3-DTE.
The inboard series is equipped with a marine gear connecting the output shaft with the
propeller shaft for operation.
The different types of marine gears used for each series are shown below.
In order to obtain full performance from your engine, it is imperative that you check the size
and structure of the hull and use a propeller of the appropriate size.
The engine must be installed correctly with safe cooling water and exhaust piping and
electrical wiring. The PTO work should be easy to use for onboard equipment.
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. Consult Yanmar’s local subsidiary in your region or your distributor or
dealer.
Consult your Yanmar dealer or distributor when selecting optional parts. Optional parts
selections should take into account operational and surrounding conditions.
This Operation Manual explains the basic points for standard operation. Variations are
explained under the specially marked sections.
2. Product explanation
8
GB
4JH3-TE 4JH3-HTE 4JH3-DTE
Marine Gear Series Series Series
KBW21 Clutch 4JH3-TE 4JH3-HTE N/A
KM4A Clutch 4JH3-TBE 4JH3-HTBE N/A
KMH4A Clutch 4JH3-THE 4JH3-HTHE 4JH3-DTHE
Mechanical wet cone clutch
Input/output special parallel drive
Mechanical wet cone clutch
7° Down angle drive
Hydraulic wet multiple disk clutch
8° Down angle drive
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