Yanmar 12AYM-WST User Manual

Warning signs used in the manual and on the product.

Safety precautions for operation and maintenance.

Instructions to prevent accidents during lifting.

Location and importance of the engine nameplate.

Diagrams showing the placement of major engine parts.

Explains the purpose of key engine systems and parts.

Illustrates the flow of fuel, coolant, and oil within the engine.

Details the instrument panel, alarm devices, and controls for engine operation.

Describes electric and air starter methods for engine ignition.

Specifications and quality criteria for engine fuel oil.

Guidelines for selecting and using engine lubricating oil.

Requirements for coolant selection and mixture ratios.

Pre-operation checks for first-time use or after long rest.

Procedures for filling fuel, lubricating oil, and coolant.

Method to lubricate engine parts before starting.

Visual inspection and fluid level checks before engine start.

Table outlining maintenance tasks and intervals.

Procedures for checking fuel level, draining, and replacing filters.

Oil level checks, filter replacement, and oil changes.

Seawater and coolant system checks, replacements, and changes.

Procedures for washing the pre-filter and blower.

Checks for alarm devices, battery fluid, and belt tension.

Procedure for setting valve clearance when the engine is cold.

Causes and countermeasures for engine starting issues.

Addresses speed drops, oil pressure, and coolant temperature issues.

Troubleshooting for sudden engine stops and exhaust gas problems.

Identifying and resolving unusual noises during operation.

Electrical schematic for engines without an air heater.

Electrical schematic for engines with an air heater.