
8. Check the fuel filter / water separator for
water and contaminants. If you find any
water or contaminants, drain the fuel
filter / water separator. See Draining the
Fuel Filter / Water Separator on page
52. If you have to drain the fuel filter /
water separator frequently, drain the
fuel tank and check for water in your fuel
supply. See Draining the Fuel Tank on
page 49.
CAUTION! If any problem is noted
during the visual check, the necessary
corrective action should be taken before
you operate the engine.
Checking Diesel Fuel and Engine
Oil
Follow the procedures in Filling the Fuel
Tank on page 22 and Checking the Engine
Oil on page 24 to check these levels.
Checking and Refilling Marine
Gear Oil
See Checking Marine Gear Oil on page 25.
Checking the Battery Electrolyte
Level
Check the battery electrolyte level before
use. See Inspecting the Battery Electrolyte
Level (Serviceable Batteries Only) on page
53.
Checking the Alternator Belt
Check the belt tension before use.
See Checking and Adjusting the Alternator
V-Belt Tension on page 51.
Checking the Throttle and Shift
Console
Check the operation of the throttle and shift
control lever. Make sure it moves smoothly.
If it is hard to operate, grease the joints of the
control cable and lever bearings. If the lever
has excessive play, adjust the control cable
connectors and clamps. See Inspecting and
Adjusting the Throttle and Shift Control
Cables on page 51.
Checking the Warning Indicators
Check to ensure the engine instruments and
warning indicators are functioning properly.
See Alarms on page 18. Check them often
during operation.
Preparing Fuel, Oil and Coolant in
Reserve
Prepare sufficient diesel fuel for the day’s
operation. Always store engine oil and
coolant in reserve (for at least one refill)
onboard, to be ready for emergencies.
BEFORE YOU OPERATE
GM Series Operation Manual 29
© 2007 Yanmar Marine International
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