Specifications

BEFORE YOU OPERATE
30 GM Series Operation Manual
NOTICE
• Select the oil viscosity based on the
ambient temperature where the engine
is being operated. See the SAE Service
Grade Viscosity Chart (Figure 4).
• Yanmar does not recommend the use of
engine oil “additives.”
Handling Engine Oil
1. When handling and storing engine oil,
be careful not to allow dust and water to
contaminate the oil. Clean around the
filler port before filling.
2. Do not mix oils of different types or
brands. Mixing may cause the chemical
characteristics of the oil to change and
lubricating performance to decrease,
reducing the engine’s life.
3. Engine oil should be replaced at the
specified intervals, regardless of the
engine’s operation history. See
Periodic Maintenance Schedule on
page 51.
Engine Oil Viscosity
Figure 2
Figure 4
Select the appropriate engine oil viscosity
based on the ambient temperature shown
in the SAE Service Grade Viscosity Chart
in Figure 4.
NOTICE
If you intend to operate your equipment at
temperatures outside the limits shown, you
must consult your authorized Yanmar
Marine dealer or distributor for special
lubricants or starting aids.
Checking the Engine Oil
1. Make sure the engine is off. It is
recommended that the engine be as
level as possible before checking the
oil.
2. Remove the dipstick (Figure 5, (2)) and
wipe with a clean cloth.
NOTICE
Prevent dirt and debris from contaminating
the engine oil. Carefully clean the dipstick
and the surrounding area before you
remove the cap.
Figure 3
Figure 5
1 – Filler Port
2–Dipstick
(1)
(2)
(4)
(3)
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