2.1 USE, DRIVING SYSTEM, ETC.This is a light, compact diesel engine for use in pleasure boats. The engine is equipped witha turbocharger and intercooler which insures maximum output while preserving lightnessand 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 to4JH3-DTE.The inboard series is equipped with a marine gear connecting the output shaft with thepropeller 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 sizeand 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 andelectrical 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 andengineering skills. Consult Yanmar’s local subsidiary in your region or your distributor ordealer.Consult your Yanmar dealer or distributor when selecting optional parts. Optional partsselections should take into account operational and surrounding conditions.This Operation Manual explains the basic points for standard operation. Variations areexplained under the specially marked sections.2. Product explanation8GB4JH3-TE 4JH3-HTE 4JH3-DTEMarine Gear Series Series SeriesKBW21 Clutch 4JH3-TE 4JH3-HTE N/AKM4A Clutch 4JH3-TBE 4JH3-HTBE N/AKMH4A Clutch 4JH3-THE 4JH3-HTHE 4JH3-DTHEMechanical wet cone clutchInput/output special parallel driveMechanical wet cone clutch7° Down angle driveHydraulic wet multiple disk clutch8° Down angle driveJH-Turbo-Engels1a 30-06-2002 13:17 Pagina 8