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Maintenance

Initial Thereafter every
50 100 200
Item Operation hours hours hours
10
hours or 12 or 12 or 24
months months months
*1 *1 *1
Hatches, hinges, and Check installation √ √
packing seals
Ladders (bow and Check installation √ √
stern)
Access port caps Check exterior and installation √
Spark plugs Check √ √
High-pressure fuel Check connections and exterior, √
hoses and check for leakage
Engine oil Replace √ √ √
Engine oil filters Replace √
Air filter elements Check for damage and dirt √
Intake hoses and Check for damage, and check con- √
breather hoses nections
Throttle bodies Lubricate throttle valves √
Anodes (engines) Check for corrosion √ *2
Valve clearance Check and adjust √ *2
Rubber couplings Check for looseness and noise √
Engine mounts Check for damage and peeling √
Cooling water hoses Check for damage, and check con-
and cooling water pi- nections √
lot outlet hoses
Water inlet strainers Check for damage √ √
Intake grates Check for damage √ √
Check for bends, damage, and for-
Impellers √ √
eign material
Impeller ducts Check and lubricate √
Jet thrust nozzles Check movement, and lubricate √
Intermediate hous- Lubricate √
ings
Anodes (jet pump Check for corrosion √
units)
*1: Whichever comes first.
*2: Check every 200 hours.
Perform the pre-operation checks and post-operation checks before performing periodic
maintenance.

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