Yanmar 6LY3-STC Operation Manual page 61

Check the Battery
WARNING! Batteries contain sulfuric
acid. NEVER allow battery fluid to come
in contact with clothing, skin or eyes.
Severe burns could result. ALWAYS
wear safety goggles and protective
clothing when servicing the battery. If
battery fluid contacts the eyes and / or
skin, immediately flush the affected area
with a large amount of clean water and
obtain prompt medical treatment.
NOTICE: NEVER turn off the battery switch
(if equipped) or short the battery cables
during operation. Damage to the electrical
system will result.
NOTICE: NEVER operate with insufficient
battery electrolyte. Operating with
insufficient electrolyte will destroy the
battery.
NOTICE: Battery fluid tends to evaporate in
high temperatures, especially in summer. In
such conditions, inspect the battery earlier
than specified.
(3)
Figure 5
6LY3 LDC Operation Manual
(2)
(1)
0002388
© 2008 Yanmar Marine International
PERIODIC MAINTENANCE
1. Do not operate engine if battery has
insufficient battery fluid, as the battery
will be destroyed.
Check the fluid level periodically. If the
level is lower than the minimum fill level
(Figure 5, (1)), fill with distilled water
(Figure 5, (2)) (available in the grocery
store) up to the upper limit
(Figure 5, (3)) of the battery. (Battery
fluid tends to evaporate in high
temperatures, especially in summer. In
such cases, inspect the battery earlier
than specified.)
2. If the starter rpm is too low and the engine
cannot be started, measure the specific
gravity of the battery with a hydrometer.
When the specific gravity of the fluid is
over 1.27 at 20°C (68°F), it is fully
charged. Fluid with a specific gravity of
below 1.24 needs charging. If the
specific gravity cannot be raised by
charging, the battery must be replaced.
Note: The capacities of the standard
alternator and the recommended battery
assume only the power necessary for
regular operation. If the power is also used
for inboard lighting or other purposes, the
generating and charging capacities may be
insufficient. In such cases, see your
authorized Yanmar Marine dealer or
distributor.
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