Yamaha MTN850-A 2017, Service Manual, Page: 135 / 560

PERIODIC MAINTENANCE
3-25
4. Drain:
•
Engine oil
(completely from the crankcase)
5. If the oil filter cartridge is also to be replaced,
perform the following procedure.
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a. Remove the oil filter cartridge “1” with an oil
filter wrench “2”.
b. Lubricate the O-ring “3” of the new oil filter
cartridge with a thin coat of engine oil.
NOTICE
ECA13390
Make sure the O-ring “3” is positioned cor-
rectly in the groove of the oil filter cartridge.
c. Tighten the new oil filter cartridge to specifi-
cation with an oil filter wrench.
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6. Install:
• Engine oil drain bolt
(along with the gasket
)
7. Fill:
•
Crankcase
(with the specified amount of the recom-
mended engine oil)
8. Install:
•
Engine oil filler cap
(along with the O-ring
)
9. Start the engine, warm it up for several min-
utes, and then turn it off.
10.Check:
• Engine
(for engine oil leaks)
11.Check:
•
Engine oil level
Refer to “CHECKING THE ENGINE OIL
LEVEL” on page 3-24.
EAS30810
MEASURING THE ENGINE OIL PRESSURE
1. Check:
•
Engine oil level
Below the minimum level mark “a”

Add the
recommended engine oil to the proper level.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
NOTICE
ECA13410
When the engine is cold, the engine oil will
have a higher viscosity, causing the engine
oil pressure to increase. Therefore, be sure
to measure the engine oil pressure after
warming up the engine.
Oil filter wrench
90890-01426
Oil filter wrench
YU-38411
Oil filter cartridge
17 N·m (1.7 kgf·m, 12 lb·ft)
Engine oil drain bolt
43 N·m (4.3 kgf·m, 31 lb·ft)
1 2
3
T
R
.
.
New
T
R
.
.
Engine oil quantity
Quantity (disassembled)
3.40 L (3.59 US qt, 2.99 Imp.qt)
Oil change
2.40 L (2.54 US qt, 2.11 Imp.qt)
With oil filter removal
2.70 L (2.85 US qt, 2.38 Imp.qt)
New
a