Specifications

PERIODIC MAINTENANCE
GM Series Operation Manual 59
12/05
If charging the battery does not raise the
specific gravity, replace the battery.
Note: The maximum fill level is
approximately 10 to 15 mm
(3/8 to 9/16 in.) above the
plates.
NOTICE
The standard alternator with the
recommended battery is designed to
produce electrical power for regular engine
operations only. If power is being used for
onboard lights and other systems, the
charging system may be inadequate.
Consult your authorized Yanmar Marine
dealer or distributor.
Perform the following maintenance every
250 hours or 1 year of operation.
• Draining the Fuel Tank
• Replacing the Fuel Filter Element
• Inspecting the Fuel Injection Nozzle
Spray Pattern
• Replacing the Engine Oil Filter
Element
• Inspecting the Seawater Pump
Impeller
• Inspecting the Zinc Anode
• Cleaning the Intake Silencer (Air
Filter)
• Cleaning the Exhaust / Water Mixing
Elbow
• Cleaning the Breather Pipe
• Checking and Adjusting the
Alternator V-Belt Tension
• Checking the Wiring Connectors
• Inspecting and Adjusting the Intake /
Exhaust Valve Clearances
• Inspecting and Adjusting the Throttle
and Shift Control Cables
Every 250 Hours of Operation
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