Periodic Maintenance Procedures; Inspect Before Starting - Yanmar 6LY3 series Service Manual

PERIODIC MAINTENANCE
PERIODIC MAINTENANCE
PROCEDURES

Inspect Before Starting

Be sure to check the following before every engine
start:
• Visual Inspection of Engine
• Check the Fuel Level
• Check the Engine Oil Level (Crankcase)
• Seawater Outlet
• Check Coolant Level
• Check All Alarm Indicators
• Check for Engine Fluid Leaks
• Check the Electronic Control System
Visual Inspection of Engine
Correct any problems before operation.
Look for:
• Oil leaks
• Fuel leaks
• Coolant leaks
• Damaged or worn parts
• Loose or missing bolts
• Fuel, coolant hoses, cracked V-belts, loose
clamps and fasteners
Check the Fuel Level
Check the fuel and fill if necessary.
4-6
Check the Engine Oil Level (Crankcase)
1. Check the engine oil level with the dipstick
(Figure 4-1, (3)). Insert the dipstick fully to
check the level.
Figure 4-1
1
1 – Rocker Arm Cover
2 – Oil Filler Cap (Yellow)
3 – Dipstick
4 – Upper Limit
5 – Lower Limit
The oil should not be dirty and should have
appropriate viscosity. No coolant or diesel fuel
should be present. The level should be between
the upper (Figure 4-1, (4)) and lower limit lines
(Figure 4-1, (5)) on the dipstick.
Figure 4-2
2. If oil level is low, fill to the specified level through
the filler port. NOTICE: Avoid overfilling the
engine oil. Add oil to the upper limit line on the
dipstick. Overfilling may induce oil into the
combustion chamber and damage components.
© 2007 Yanmar Marine International

Periodic Maintenance Procedures

2
Figure 4-1
Engine Oil Capacity at a Rake Angle of 0°
18.8 L (19.9 qt)
SAE 10W-30
SAE 15W-40
-4°F 14°F 32°F 50°F 68°F
(-20°C) (-10°C) (0°C) (10°C) (20°C) (30°C) (40°C)
Figure 4-2
6LY3 Service Manual
3
4
5
0002051
86°F 104°F
0000005