
PERIODIC MAINTENANCE
58 GM Series Operation Manual
Perform the following maintenance every
150 hours of operation.
• Changing the Engine Oil
• Changing the Marine Gear Oil
• Inspecting the Battery Electrolyte
Level
Changing the Engine Oil
See Changing the Engine Oil on page 54.
Changing the Marine Gear Oil
Refer to the Operation Manual supplied
with your marine gear or sail-drive unit for
service and maintenance details.
Inspecting the Battery Electrolyte
Level (Serviceable Batteries Only)
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.
Battery fluid tends to evaporate in high
temperatures, especially in summer. In
such conditions, inspect the battery earlier
than specified.
1. Make sure the engine is off and the key
is removed.
2. Turn the master battery switch to OFF
(if equipped) or disconnect the negative
(-) battery cable.
3. Remove the plugs and check the
electrolyte level in all cells.
Never attempt to remove the covers or
fill a maintenance-free battery.
4. If the electrolyte level is lower than the
minimum fill level (Figure 3, (1)), fill
with distilled water (Figure 3, (2))
(available locally) to the upper level
(Figure 3, (3)) of the battery.
Figure 3
Figure 3
1 – Lower Level
2 – Battery Fluid
3 – Upper Level
If the engine cannot be started or the
engine speed does not rise to rated output,
measure the specific gravity of the battery
with a hydrometer. The specific gravity of a
fully charged battery is 1.27 or more at
20C (68F). Specific gravity of 1.24 or
lower requires battery charging.
Every 150 Hours of Operation
UPPER LEVEL
LOWER LEVEL
2
3
1
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GM_OM.book 58 ページ 2013年6月10日 月曜日 午後2時26分
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