
○: Check or Clean ◊: Replace ●: Contact your authorized Yanmar marine dealer or distributor
System Item Periodic Maintenance Interval
Daily Every 50
hours or
monthly
which-
ever
comes
first
Every
125
hours or
6
months
which-
ever
comes
first
Every
250
hours
or one
year
which-
ever
comes
first
Every
500
hours
or 2
years
which-
ever
comes
first
Every
1000
hours
or 4
years
which-
ever
comes
first
Every
1250
hours
or 5
years
which-
ever
comes
first
Seawater
Cooling
System
Check
seawater
outlet
discharge
○
During
Oper-
ation
Check or
replace the
seawater
pump
impeller
●
Check or
replace the
zinc
anodes
◊
Check and
clean the
seawater
passage
●
Piping Clean or
replace the
exhaust /
water
mixing
elbow
●
Check or
replace
fuel line
and rubber
hoses
○ ●
Electrical
System
Check the
alarm and
indicators
○
Check the
electrolyte
level in the
battery
○
Adjust the
tension of
the
alternator
V-belt or
replace V-
belt
○ ●
PERIODIC MAINTENANCE
56 6LPA Series Operation Manual
© 2007 Yanmar Marine International
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