Yanmar 3YM20, Operation Manual

Page: 39 / 56

4. MAINTENANCE AND INSPECTION
39
EN
4.3 Periodic Inspection Items
4.3.1 Inspection on Initial 50 Hrs. of
Operation (or after 1 Month)
(1) Replace the Engine Lubricating Oil
and Lubricating Oil Filter (1st time)
During initial operation of the engine,
the oil is quickly contaminated due to
the initial wear of internal parts. The lu-
bricating oil must therefore be re-
placed early. Replace the lubricating
oil filter at the same time.
It is easiest and most effective to drain
the engine lubricating oil after opera-
tion while the engine is still warm.
1. Remove the lubricating oil dipstick. At-
tach the oil drain pump and pump out
the oil.
For easier draining, remove the oil fill-
er cap (yellow) at the top of the rocker
arm cover or gear case cover.
2. Remove the lubricating oil filter with
the filter detach/attach tool (Turn
counterclockwise.)
3. Clean the filter installation face and at-
tach the new filter, tightening by hand
until the seal touches.
4. Turn an additional 3/4 of a turn with
the attachment tool. (Turn clockwise.
Tightening torque: 20 - 24 Nm
(177-212 lb-in))
5. Fill with new lubricating oil. (See 3.2.2)
6. Perform a trial run and check for oil
leaks.
7. Approximately 10 minutes after stop-
ping the engine, remove the oil dip-
stick and check the oil level. Add oil if
the level is too low.
Beware of oil splashes if extracting
the lubricating oil while it is hot.
(2) Replace the Marine Gear Lubricat-
ing Oil (1st time)
During initial operation, the oil is quick-
ly contaminated due to the initial wear
of internal parts. The lubricating oil
must therefore be replaced early.
1. Remove the cap from the filler port
and attach the oil drain pump. Drain off
oil.
2. Fill with new lubricating oil. (See 3.2.3)
3. Perform a trial run and check for oil
leakage.
(3) Replace the Sail Drive Oil (1st time)
Refer to the operation manual of the
sail drive for the procedure of the oil
replacement.
(4) Draining the (optional) Fuel Tank
Put a pan under the drain to catch the
fuel.
Open the drain cock and drain off any
water or dirt collected.
Once the water and dirt has been
drained off and the fuel coming out is
clear, close the drain cock.
(5) Inspection and Adjustment of In-
take/ Exhaust Valve Head Clear-
ance (1st time)
Settling of a new engine and individual
engine use will cause changes in the
intake/exhaust valve and rocker arm
clearance, and adjustment is neces-
sary. This adjustment requires spe-
cialized knowledge and techniques.
Consult your Yanmar dealer or distrib-
utor.
CAUTION