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General| Brand | Volvo Penta |
|---|---|
| Model | MD21A |
| Category | Engine |
| Language | English |
Overview of gauges, warning lamps, and switches for engine operation.
Explanation of control levers for gear shifting and engine speed.
Recommendations for fuel, lubricating oil, and initial run-in.
Guidance on breaking in a new or reconditioned engine for longevity.
Steps to prevent damage from freezing temperatures to the cooling system.
Essential checks and steps before starting the engine.
Step-by-step guide for safely starting the engine.
Correct steps for shutting down the engine safely.
Detailed explanation of the engine block, cylinder head, and internal parts.
How the engine's lubrication system functions and its components.
Description of the fuel feed, filter, and injection systems.
Explanation of the fresh-water and sea-water cooling circuits.
Information on the RB type reverse and reduction gear.
Specific details on the Borg-Warner hydraulic reverse gear.
Description of the engine's 12V electrical system and components.
Summary table of periodic servicing operations and intervals.
Procedure for daily checking of the engine oil level.
Procedure for checking the oil level in the reverse gear.
Instructions for changing engine oil at specified intervals.
Procedure for changing oil in RB and Borg-Warner reverse gears.
Instructions for changing the engine oil filter.
Procedure for checking and adjusting the V-belt tension.
Daily check of the fuel water separator for collected water.
Procedure for changing the fine filter and cleaning the pre-filter.
Steps for venting the fuel system after maintenance or draining.
Procedure for checking the fresh-water cooling system coolant level.
Procedure for checking and maintaining zinc anodes.
Procedure for checking the electrolyte level in the battery.
Procedure for checking and adjusting engine valve clearances.
Procedure for re-tightening cylinder head bolts on new/reconditioned engines.
Procedure for adjusting the engine's idling speed.
Procedure for checking and servicing fuel injectors.
Maintenance tasks for the engine's cooling system.
Procedure for replacing the impeller in the sea-water pump.
Maintenance and checks for the engine's electrical system.
Procedure for checking and cleaning glow plugs.
Regular checks for oil leakage, noise, and temperature in reverse gears.
Instructions for engines that will remain idle for varying periods.
Steps for preparing the engine for storage on land.
Steps for preparing the engine after storage.
Steps for preparing the engine for launching after storage.
Guide to diagnosing common running interruptions and their causes.
Key specifications including bore, stroke, displacement, and output.
Permissible engine speeds for pleasure and work boats.
Specifications for inlet and exhaust valve clearances.
Specifications for engine and reverse gear oil grade, viscosity, and capacity.
Details on injection pump, filters, injectors, and timing.
Specifications for fresh-water system capacity and thermostat opening.
Specifications for voltage, generator/alternator output, and battery.
Specifications for RB and Borg-Warner reverse gears, including ratios.
Specified torque values for cylinder head bolts, injectors, and glow plugs.
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