GENERAL SERVICE INFORMATION
Engine Oil
3-8 6LY3 Service Manual
© 2007 Yanmar Marine International
ENGINE OIL
Engine Oil Specifications
NOTICE: Use the correct engine oil to maintain
engine performance and reduce engine wear.
Selection of Engine Oil
Use an engine oil that meets or exceeds the
following classifications:
• API Service Category - CD or higher
• TBN Valve - 9 or more
• SAE viscosity - 15W40
If the engine is operated at temperatures below
those shown in Figure 3-5, consult your Yanmar
Marine dealer for special lubricants and starting
aids.
Figure 3-5
Figure 3-5
The following oils should not be used for 6LY3-ETP,
STP or UTP engines:
• API: CG-4, CH-4
• ACEA: E-1, E-2, B
• JASO: DH-2, DL-1
Additional Technical Engine Oil
Requirements
The engine oil must be changed when the Total
Base Number (TBN) has been reduced to 2.0. TBN
(mgKOH / g) test method; JIS K-2501-5.2-2 (HCI),
ASTM D4739 (HCI).
Handling Engine Oil
1. Check that the engine oil, oil storage container
and filling equipment are free of sediment and
water.
2. NEVER mix engine oils of different types.
3. Extract any residual oil from the engine or
marine gear before servicing for the first time.
Always use fresh new oil.
4. Engine oil degrades over time, even when the
engine is not in use. Change oil at specified
times regardless of engine usage.
MARINE GEAR OIL
Refer to the Operation Manual for marine gear oil
specifications.
0006258
Selection of viscosity (SAE Service grade)
Atmospheric temperature (°C)
10W
20W
#20
#30
#40
10W-30
15W-40
-20 -10 0 10 20 30 40 50
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