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BY Series Operation Manual 23

BY Series Operation Manual

PRODUCT

OVERVIEW

YANMAR BY-SERIES

FEATURES AND

APPLICATIONS

The BY-series engines are in-line 4- and

6-cylinder direct injection diesel engines.

The engines are turbocharged and

equipped with a liquid cooling system.

These engines are designed for pleasure

craft use.

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 a new

vessel be propped so the engine can

operate at 100 rpm above maximum 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 engine.

The engine must be installed correctly with

the seawater or cooling water piping,

exhaust gas piping 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 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. See

Yanmar's local subsidiary in your region or

your authorized Yanmar marine dealer or

distributor.

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