Inspection Every 250 Hours Or One Year - Yanmar 3YM30 Sevice Manual

2. Inspection and adjustment

2.2.5 Inspection every 250 hours or one year

Be sure to check the following points every 250 hours or one year operation, whichever comes first.
No.
(1) Drain the fuel tank
(2) Replace the fuel filter
(3) Replace the marine gear lube oil
(4) Replace the engine lube oil filter
(5) Check the impeller of the cooling water pump (seawater pump)
(6) Replace the fresh water coolant
(7) Clean the element of the air intake silencer
(8) Clean the exhaust/water mixing elbow
(9) Adjust the tension of the alternator driving belt
(10) Check the wiring connectors
(1) Drain the fuel tank
Refer to 2.2.2(1) for the procedure.
(2) Replace the fuel filter
Replace the fuel filter with new one at the specified
interval, before it is clogged with dust to adversely affect
the fuel flow. Also, replace the fuel filter after the
engine has fully been cooled.
1) Close the fuel cock of the fuel tank.
2) Remove the fuel filter using a filter wrench
(customer procured).
filter, hold the bottom of the fuel filter with a piece
of rag to prevent the fuel oil from dropping.
3) Clean the filter mounting surface and slightly apply
fuel oil to the gasket of the new fuel filter.
4) Install the new fuel filter manually turning until it
comes into contact with the mounting surface, and
tighten it further to one turn using a filter wrench.
Tightening torque: 20-24N•m
Applicable fuel filter
element Part No.
104500-55710
5) Bleed the fuel system. Refer to 2.2.3.(1).
IMPORTANT:
Be sure to use genuine Yanmar part (super fine mesh
filter). Otherwise, it results in engine damage,
uneven engine performance and shorten engine life.
Inspection Item
When removing the fuel
O-ring Part No.
24341-000440
31
Air bleeding
Bracket
O-ring
Filter element
Filter cap
Retaining ring
(Fuel filter)