Yanmar Marine Diesel Engine 3JH3(B)(C)E, 4JH3(B)(C)E
This service manual has been complied for engineers engaged in sales, service, inspection and maintanance. Accordingly, descriptions of the construction and functions of the engine are emphasized in this manual while items which should be common knowledge are omitted.
One characteristic of a marine diesel engine is that its performance in a vessel is governed by the applicability of the vessel's hull construction and its steering system.
Engine installation, fitting out and propeller selection have a substancial effect on the performance of the engine and the vessel. Moreover, when the engine runs unevenly or when trouble occurs, it is essential to check a wide range of operating conditions - such as installation to the hull and suitability of the ship's piping and propeller - and not just the engine itself. To get maximum performance from this engine, you should completely understand its functions, construction and capabilities, as well as proper use and servicing.
Use this manual as a handy reference in daily inspection and maintanance, and as a text for engineering guidance.
Model 4JH3E has been used for the illustrations in this service manual, but they apply to models 3JH3E, 3JH3BE, 3JH3CE, 4JH3BE and 4JH3CE as well.
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