Yanmar 4JH45 Operation Manual page 67

12/05
: Check or Clean : Replace ●: Consult your authorized Yanmar Marine dealer or distributor
System
Cooling Seawater outlet
System
Check coolant level
Check or replace the
seawater pump impeller
Replace coolant
Clean and check the
seawater passages
Air Intake Clean intake silencer (air
and cleaner) element
Exhaust
Clean or replace the
System
exhaust/water mixing elbow
Wash the turbocharger
blower - 4JH80/4JH110 only
Check diaphragm assembly
4JH45/4JH57 only
Electrical Check the alarm and
System indicators
Check the electrolyte level in
the battery
Adjust the tension of the
alternator V-ribbed belt or
replace V-ribbed belt
Check the wiring connectors
Engine Check for leakage of fuel,
Cylinder engine oil and engine coolant
Head and
Block
Tighten all major nuts and
bolts
Adjust intake/exhaust valve
clearance
Miscellane Check the remote control
ous Items cable operation
Adjust the propeller shaft
alignment
Replace rubberized hoses
(fuel and water)
Note: These procedures are considered normal maintenance and are performed at the owner's expense.
JH Series Operation Manual
Item
Daily
See Daily
Checks
on
page 62.

During
Operation

Every year. When Long Life Coolant is used, replace every 2 years.
See Engine Coolant Specifications on page 41.


After
starting
PERIODIC MAINTENANCE
Periodic Maintenance Interval
Every 50 Every 250
hours or hours or 1
monthly year which-
which- ever ever comes
comes first first



●

 
Initial 50

●
● Initial 50
 Initial 50
●Initial 50
Replace every 2 years.
Every 500 Every 1000
hours or 2 hours or 4
years years
which- ever which- ever
comes first comes first

●

●

●
●
●
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