Checking The Engine Oil Level - Yamaha Grizzly550 User Manual

ECA28P1041
NOTICE
Before removing the spark plug, use com-
pressed air to blow away any dirt accumulat-
ed in the spark plug well to prevent it from
falling into the cylinder.
6. Attach:
• Extension "1"
• Compression gauge "2"
Compression gauge
90890-03081
Engine compression tester
YU-33223
Extension
90890-04082
7. Measure:
• Compression pressure
Out of specification → Refer to steps (c) and
(d).
Standard compression pressure
(at sea level)
480 kPa (4.8 kgf/cm², 68.3 psi)
(YFM5FGY/YFM5FGPY)
450 kPa (4.5 kgf/cm², 64.0 psi)
(YFM7FGY/YFM7FGPY)
Minimum–maximum
420–540 kPa (4.2–5.4 kgf/cm²,
59.7–76.8 psi)
(YFM5FGY/YFM5FGPY)
390–500 kPa (3.9–5.0 kgf/cm²,
55.5–71.1 psi)
(YFM7FGY/YFM7FGPY)
M MMM M MMM M M MMM M M MMM M
a. Set the main switch to "ON".
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
EWA28P1005
WARNING
To prevent sparking, ground the spark plug
lead before cranking the engine.
2
1
M MMM M M MMM M MMM
c. If the compression pressure is above the
maximum specification, check the cylinder
head, valve surfaces and piston crown for
carbon deposits.
Carbon deposits → Eliminate.
d. If the compression pressure is below the min-
imum specification, pour a teaspoonful of en-
gine oil into the spark plug bore and measure
again.
Refer to the following table.
Compression pressure (with oil applied into
the cylinder)
Reading
Higher than without
oil
Same as without oil
L LLL L LLL L L LLL L
8. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
9. Connect:
• Spark plug cap
10.Install:
• Right side panel
Refer to "GENERAL CHASSIS" on page 4-1.
EAS20750

CHECKING THE ENGINE OIL LEVEL

1. Place the vehicle on a level surface.
2. Check the engine oil level on a cold engine.
TIP
If the engine was started before checking the oil
level, be sure to warm up the engine sufficiently,
and then wait at least 10 minutes until the oil set-
tles for an accurate reading.
3. Remove:
• Dipstick accessing panel
Refer to "GENERAL CHASSIS" on page 4-1.
4. Check:
• Engine oil level
The engine oil level should be between the
minimum level mark "a" and maximum level
mark "b".
Below the minimum level mark → Add the
recommended engine oil to the proper level.
3-9
ENGINE
Diagnosis
Piston ring(s) wear or
damage → Repair.
Piston, valves, cylin-
der head gasket or
piston ring(s) possi-
bly defective → Re-
pair.
L LLL L L LLL L L LLL L LLL