ENGINE
3-9
NOTICE
ECA28P1041
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”
7. Measure:
• Compression pressure
Out of specification
→
Refer to steps (c) and
(d).
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a. Set the main switch to “ON”.
b. With the throttle wide open, crank the engine
until the reading on the compression gauge
stabilizes.
WARNING
EWA28P1005
To prevent sparking, ground the spark plug
lead before cranking the engine.
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.
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8. Install:
• Spark plug
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.
Compression gauge
90890-03081
Engine compression tester
YU-33223
Extension
90890-04082
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)
2
1
Compression pressure (with oil applied into
the cylinder)
Reading
Diagnosis
Higher than without
oil
Piston ring(s) wear or
damage
→
Repair.
Same as without oil
Piston, valves, cylin-
der head gasket or
piston ring(s) possi-
bly defective
→
Re-
pair.
T
R
.
.
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
Summary of Contents for Grizzly550
Page 1: ......
Page 4: ......
Page 6: ......
Page 11: ...FEATURES 1 4 techsparkstudio com ...
Page 55: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 26 techsparkstudio com ...
Page 58: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 1 2 3 4 5 ...
Page 60: ...COOLING SYSTEM DIAGRAMS 2 31 EAS20420 COOLING SYSTEM DIAGRAMS 1 2 3 8 7 6 5 4 ...
Page 68: ...CABLE ROUTING 2 39 A A B B C C A A B B C C A C D E E F B 1 1 2 2 3 3 3 4 5 5 6 6 7 8 ...
Page 74: ...CABLE ROUTING 2 45 A C D B B B B E E B B E E C D A 1 2 2 2 3 3 A B B C C D E E F 4 4 4 ...
Page 76: ...CABLE ROUTING 2 47 ...
Page 79: ...techsparkstudio com ...
Page 116: ...ELECTRICAL SYSTEM 3 37 ...
Page 119: ...techsparkstudio com ...
Page 136: ...FRONT WHEELS 4 17 ...
Page 188: ...REAR ARMS AND REAR SHOCK ABSORBER ASSEMBLIES 4 69 7 6 7 6 4 3 5 2 8 8 1 ...
Page 230: ...AC MAGNETO AND STARTER CLUTCH 5 39 1 ...
Page 246: ...PRIMARY AND SECONDARY SHEAVES 5 55 ...
Page 292: ...WATER PUMP 6 11 ...
Page 302: ...THROTTLE BODY 7 9 ...
Page 334: ...REAR CONSTANT VELOCITY SHAFT ASSEMBLIES FINAL DRIVE ASSEMBLY AND REAR DRIVE SHAFT 8 31 ...
Page 337: ...techsparkstudio com ...
Page 351: ...CHARGING SYSTEM 9 14 techsparkstudio com ...
Page 355: ...LIGHTING SYSTEM 9 18 techsparkstudio com ...
Page 363: ...SIGNALING SYSTEM 9 26 techsparkstudio com ...
Page 391: ...FUEL INJECTION SYSTEM 9 54 techsparkstudio com ...
Page 395: ...FUEL PUMP SYSTEM 9 58 techsparkstudio com ...
Page 411: ...EPS ELECTRIC POWER STEERING SYSTEM for YFM5FGP YFM7FGP 9 74 techsparkstudio com ...
Page 414: ...ELECTRICAL COMPONENTS 9 77 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ...
Page 436: ...ELECTRICAL COMPONENTS 9 99 ...