Product Explanation; Use, Propulsion System, Etc - Yanmar 4JH4-TE Operation Manual

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2. PRODUCT EXPLANATION

2. PRODUCT EXPLANATION

2.1 Use, Propulsion System, Etc.

The engine is equipped with a marine gear or a sail drive unit. The marine gear output shaft connects with the
propeller shaft.
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.
As new boats are used, owners add additional equipment and completely fill the fuel and water tanks adding
to the overall displacement (weight) of the vessel. Extra canvas enclosures, bottom paint, and bottom fouling
can add additional hull resistance. It is recommended that new vessels be propped so the engines can oper-
ate at 100-200 rpm above rated rpm 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
engines.
The engine must be installed correctly with safe cooling water and exhaust piping and electrical wiring. Any
auxiliary equipment attached to the engine should be accessible and easy to use for onboard equipment.
To handle the drive equipment, propulsion systems (including the propeller) and other onboard equipment be
sure to observe the instructions and cautions given in the operation manuals supplied by the shipyard and
equipment manufacturers.
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.
This engine is designed for pleasure boat applications.
The engine is designed to be operated at:
Maximum throttle (3000-3200 rpm) for less than 5% of total engine time. (30 minutes out of every 10 hours)
Cruising Speed (2800 rpm or lower) for less than 90% of total engine time (9 hours out of every 10 hours)
Never modify this product or release the limit devices (which limit engine speed, fuel injection quantity, etc.).
Modification will impair the safety and performance of the product and functions and shorten the product life.
Please note that any troubles arising from modification of the product will not be covered by our warranty.