Table of Contents
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Table of Contents
Related Manuals for Yanmar YSB12
Summarization of Contents
Before Using the Engine
Fuel oil
Check and fill fuel oil for proper operation.
Lubricating oil
Check and fill lubricating oil to prevent wear.
Amount of lub. oil
Specifies oil capacity for YSB8 (6.5L) and YSB12 (9.5L).
Running in
Procedure for breaking in a new engine over the first 50 hours.
Preparation
Fuel oil preparation
Fill fuel tank and open fuel cock before starting.
Checking fuel injection
Set control levers and turn handle to check injection sound.
Lubricating oil check
Check oil level using the dipstick and add fresh oil as needed.
Lubricating oil strainer
Instructions for cleaning the oil strainer element to ensure clean oil flow.
Lubrication of each part
Procedures for lubricating critical engine parts like the starting chain.
Starting
Hand starting
Step-by-step guide for starting the engine manually using the starting handle.
Electrical starting
Step-by-step guide for starting the engine using the electric starter.
Improving engine starting
Method for priming the engine with gasoline in cold weather conditions.
Engine warming up
Procedure for running the engine without load and then gradually increasing speed.
Points to Check During Operation
Fuel oil monitoring
Check the fuel level gauge and add fuel before it becomes empty.
Lubricating oil monitoring
Verify proper circulation and level of lubricating oil.
Cooling water check
Periodically check that cooling water is exiting the outlet.
Exhaust gas analysis
Analyze exhaust color; black fumes indicate excessive load.
Abnormal sound detection
Immediately stop the engine if unusual noises are heard and investigate.
Stopping
Reduce speed and idle
Gradually decrease engine speed to LOW and let the engine idle.
Stop engine and secure
Place gear in NEUTRAL, stop engine, and close the fuel cock.
Drain cooling water
Procedure to drain cooling water to prevent freezing in cold weather.
Air Venting
Open fuel cock
Open the fuel cock to allow fuel flow.
Remove fuel pipe nipples
Remove nipples from both ends of the high pressure fuel pipe.
Loosen delivery valve holder
Loosen the holder to allow fuel to exit the injection pump.
Tighten holder firmly
Securely tighten the holder after airfree fuel appears.
Connect high pressure pipe
Connect one side of the high pressure pipe to the holder.
Set speed control to FULL
Move the speed control lever to the FULL position.
Turn starting handle to expel air
Turn the starting handle 20-30 times until air exits the pipe.
Final injection sound check
Tighten nipple and turn handle until characteristic injection sound is heard.
Adjustment of Fuel-Injection Regulator
Initial Regulator Adjustment
Loosen locknut, turn connecting screw 90 deg anticlockwise, then tighten locknut.
Subsequent Regulator Adjustment Steps
Loosen screws, set speed lever to FULL, position connecting screw parallel to pump lever.
Continue Subsequent Adjustment
Screw regulator spindle, adjust connecting screw/nut, turn/fix screw 90 degrees.
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