RedMax EB7001RH Specifications Page 61
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51
7. Maintenance Standards
7-1 Engine
Maintenance Item Unit Specifications
Category －
－－
－ Handheld Blower Backpack Blower
Engine Type －
－－
－ G23L GZ25N GZ30N G4K GZ48N GZ51N G62L GZ65N GZ72N
HB2302
HB2311EZ
HBZ2601
EBZ3000/ 3000RH
EBZ3050RH
EB4300 EBZ4800
EBZ5100/ 5100RH/
5100Q
EBZ5150/ 5150RH/
5150Q
EB6200
EB7000
EB7001
EBZ7100/ 7100RH
EBZ7150/ 7150RH
EBZ8001/ 8001RH
EBZ8050/ 8050RH
Model
Blower Model －
－－
－
Standard Limit Standard Limit Standard Limit Standard Limit Standard Limit Standard Limit Standard Limit Standard Limit Standard Limit
Measuring
Instrument
Service
Procedure
Cylinder Bore mm (in.)
φ32.00
(1.2598)
φ32.06
(1.2622)
φ34.00
(1.3386)
φ34.06
(1.3409)
φ38.00
(1.4961)
φ38.06
(1.4984)
φ40.00
(1.5748)
φ40.06
(1.5772)
φ43.00
(1.6929)
φ43.06
(1.6953)
φ44.00
(1.7323)
φ44.06
(1.7346)
φ47.50
(1.8701)
φ47.56
(1.8724)
φ47.53
(1.8713)
φ47.59
(1.8736)
φ50.03
(1.9697)
φ50.09
(1.9720)
Cylinder Gauge
Replacement
(Plating Damaged
Replacement)
Piston Diameter
(Skirt)
mm (in.)
φ31.945
(1.2577)
～φ31.960
(1.2583)
φ31.86
(1.2543)
φ33.960
(1.3370)
～φ33.975
(1.3376)
φ33.86
(1.3331)
φ37.950
(1.4941)
～φ37.970
(1.4949)
φ37.86
(1.4906)
φ39.960
(1.5732)
～φ39.975
(1.5738)
φ39.87
(1.5697)
φ42.955
(1.6911)
～φ42.970
(1.6917)
φ42.87
(1.6878)
φ43.965
(1.7309)
～φ43.985
(1.7317)
φ43.88
(1.7276)
φ47.455
(1.8683)
～φ47.470
(1.8689)
φ47.37
(1.8650)
φ47.458
(1.8684)
～φ47.478
(1.8692)
φ47.37
(1.8650)
φ49.958
(1.9669)
～φ49.978
(1.9676)
φ49.87
(1.9634)
Micrometer Replacement
Top mm (in.)
1.51
(0.0594)
1.60
(0.0630)
1.03
(0.0406)
1.30
(0.0512)
1.23
(0.0484)
1.30
(0.0512)
1.57
(0.0618)
1.60
(0.0630)
1.25
(0.0492)
1.30
(0.0512)
1.25
(0.0492)
1.30
(0.0512)
1.55
(0.0610)
1.60
(0.0630)
1.25
(0.0492)
1.30
(0.0512)
1.25
(0.0492)
1.30
(0.0512)
Piston Ring
Groove Width
2nd mm (in.)
1.51
(0.0594)
1.60
(0.0630)
1.01
(0.0398)
1.30
(0.0512)
1.21
(0.0476)
1.30
(0.0512)
1.57
(0.0618)
1.60
(0.0630)
1.22
(0.0480)
1.30
(0.0512)
1.22
(0.0480)
1.30
(0.0512)
1.53
(0.0602)
1.60
(0.0630)
1.23
(0.0484)
1.30
(0.0512)
1.23
(0.0484)
1.30
(0.0512)
Thickness Gauge Replacement
Piston Pin Hole mm (in.)
φ7.990
(0.3146)
φ8.04
(0.3165)
φ7.995
(0.3148)
φ8.04
(0.3165)
φ8.995
(0.3541)
φ9.04
(0.3559)
φ10.995
(0.4329)
φ11.04
(0.4346)
φ10.995
(0.4329)
φ11.04
(0.4346)
φ10.995
(0.4329)
φ11.04
(0.4346)
φ10.995
(0.4329)
φ11.04
(0.4346)
φ11.995
(0.4722)
φ12.05
(0.4744)
φ11.995
(0.4722)
φ12.05
(0.4744)
Cylinder Gauge Replacement
Clearance Between
Piston and Cylinder
mm (in.)
0.040
(0.0016)
～0.080
(0.0031)
0.20
(0.0079)
0.025
(0.0010)
～0.065
(0.0026)
0.20
(0.0079)
0.030
(0.0012)
～0.075
(0.0030)
0.20
(0.0079)
0.025
(0.0010)
～0.065
(0.0026)
0.19
(0.0074)
0.030
(0.0012)
～0.070
(0.0028)
0.19
(0.0075)
0.015
(0.0006)
～0.060
(0.0024)
0.18
(0.0071)
0.030
(0.0012)
～0.065
(0.0026)
0.19
(0.0075)
0.052
(0.0020)
～0.092
(0.0036)
0.22
(0.0087)
0.052
(0.0020)
～0.092
(0.0036)
0.22
(0.0087)
Micrometer,
Cylinder Gauge
Piston
Replacement
Top mm (in.)
0.02
(0.0008)
～0.06
(0.0024)
0.10
(0.0039)
0.04
(0.0016)
～0.08
(0.0031)
0.10
(0.0039)
0.04
(0.0016)
～0.08
(0.0031)
0.10
(0.0039)
0.08
(0.0031)
～0.12
(0.0047)
0.15
(0.0059)
0.06
(0.0024)
～0.10
(0.0039)
0.15
(0.0059)
0.06
(0.0024)
～0.10
(0.0039)
0.15
(0.0059)
0.06
(0.0024)
～0.10
(0.0039)
0.15
(0.0059)
0.06
(0.0024)
～0.10
(0.0039)
0.15
(0.0059)
0.06
(0.0024)
～0.10
(0.0039)
0.15
(0.0059)
Clearance
Between
Piston
Groove and
Piston Ring
2nd mm (in.)
0.02
(0.0008)
～0.06
(0.0024)
0.10
(0.0039)
0.02
(0.0008)
～0.06
(0.0024)
0.10
(0.0039)
0.02
(0.0008)
～0.06
(0.0024)
0.10
(0.0039)
0.08
(0.0031)
～0.12
(0.0047)
0.15
(0.0059)
0.03
(0.0012)
～0.07
(0.0028)
0.15
(0.0059)
0.03
(0.0012)
～0.07
(0.0028)
0.15
(0.0059)
0.04
(0.0016)
～0.08
(0.0031)
0.15
(0.0059)
0.04
(0.0016)
～0.08
(0.0031)
0.15
(0.0059)
0.04
(0.0016)
～0.08
(0.0031)
0.15
(0.0059)
Thickness Gauge Replacement
Piston
Fitting Between
Piston Pin and
Piston Pin Hole
mm (in.)
0.010T
(0.00039T)
～0.006L
(0.00024L)
0.06L
(0.00024L)
0.005T
(0.00020T)
～0.011L
(0.00043L)
0.06L
(0.00024L)
0.005T
(0.00020T)
～0.011L
(0.00043L)
0.06L
(0.00024L)
0.005T
(0.00020T)
～0.011L
(0.00043L)
0.06L
(0.00024L)
0.005L
(0.00020T)
～0.021L
(0.00083L)
0.06L
(0.00024L)
0.005L
(0.00020T)
～0.021L
(0.00083L)
0.06L
(0.00024L)
0.005L
(0.00020T)
～0.021L
(0.00083L)
0.06L
(0.00024L)
0.005L
(0.00020T)
～0.021L
(0.00083L)
0.07L
(0.0028L)
0.005L
(0.00020T)
～0.021L
(0.00083L)
0.07L
(0.0028L)
Micrometer,
Cylinder Gauge
Replacement
End Gap at Cylinder
Skirt
mm (in.)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.10
(0.0039)
～0.30
(0.0118)
0.50
(0.0197)
0.15
(0.0059)
～0.35
(0.0138)
0.6
(0.0236)
0.15
(0.0059)
～0.35
(0.0138)
0.6
(0.0236)
0.15
(0.0059)
～0.35
(0.0138)
0.6
(0.0236)
Thickness Gauge Replacement
Piston Ring
Width mm (in.)
1.5
(0.0591)
1.4
(0.0551)
1.0
(0.0394)
0.9
(0.0354)
1.2
(0.0472)
1.1
(0.0433)
1.5
(0.0591)
1.4
(0.0551)
1.2
(0.0472)
1.1
(0.0433)
1.2
(0.0472)
1.1
(0.0433)
1.5
(0.0591)
1.4
(0.0551)
1.2
(0.0472)
1.1
(0.0433)
1.2
(0.0472)
1.1
(0.0433)
Micrometer Replacement
Piston Pin Diameter mm (in.)
φ8.00
(0.3150)
φ7.98
(0.3142)
φ8.00
(0.3150)
φ7.98
(0.3142)
φ9.00
(0.3543)
φ8.98
(0.3535)
φ11.00
(0.4331)
φ10.98
(0.4323)
φ11.00
(0.4331)
φ10.98
(0.4323)
φ11.00
(0.4331)
φ10.98
(0.4323)
φ11.00
(0.4331)
φ10.98
(0.4323)
φ12.00
(0.4724)
φ11.98
(0.4717)
φ12.00
(0.4724)
φ11.98
(0.4717)
Micrometer Replacement
Small End Bore mm (in.)
φ11.00
(0.4331)
φ11.03
(0.4343)
φ11.00
(0.4331)
φ11.03
(0.4343)
φ12.00
(0.4724)
φ12.03
(0.4736)
φ15.00
(0.5906)
φ15.03
(0.5917)
φ15.00
(0.5906)
φ15.03
(0.5917)
φ15.00
(0.5906)
φ15.03
(0.5917)
φ15.00
(0.5906)
φ15.03
(0.5917)
φ16.00
(0.6299)
φ16.03
(0.6311)
φ16.00
(0.6299)
φ16.03
(0.6311)
Cylinder Gauge Replacement
Connecting
Rod
Parallelism of
Large/ Small End
Bores
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
-
0.15/ 100
Mandrel Dial
Gauge
Replacement
Diameter at Main
Bearing
mm (in.)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ16.00
(0.6299)
φ15.95
(0.6280)
φ16.00
(0.6299)
φ15.95
(0.6280)
Micrometer Replacement
Crankshaft
(Starter
Side)
Diameter at Oil Seal mm (in.)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ16.00
(0.6299)
φ15.90
(0.6260)
φ16.00
(0.6299)
φ15.90
(0.6260)
Micrometer Replacement
Diameter at Main
Bearing
mm (in.)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ12.00
(0.4724)
φ11.97
(0.4713)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ15.00
(0.5906)
φ14.95
(0.5886)
φ16.00
(0.6299)
φ15.95
(0.6280)
φ16.00
(0.6299)
φ15.95
(0.6280)
Micrometer Replacement
Crankshaft
(Fan Side)
Diameter at Oil Seal mm (in.)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ12.00
(0.4724)
φ11.90
(0.4685)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ15.00
(0.5906)
φ14.90
(0.5866)
φ16.00
(0.6299)
φ15.90
(0.6260)
φ16.00
(0.6299)
φ15.90
(0.6260)
Micrometer Replacement
Eccentricity mm (in.)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
-
0.07
(0.0028)
Dial Gauge,
Center Support
Repair or
Replacement
Width Between
Crank Webs
mm (in.)
22.0
(0.8661)
21.9
(0.8622)
～22.1
(0.8701)
22.0
(0.8661)
21.9
(0.8622)
～22.1
(0.8701)
24.0
(0.9449)
23.9
(0.9409)
～24.1
(0.9488)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
29.0
(1.1417)
28.9
(1.1378)
～29.1
(1.1457)
Micrometer
Repair or
Replacement
Crankshaft
Complete
Axial Play mm (in.)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
-
0.5
(0.0197)
Thickness Gauge Repair (Shim)
Main Bearing (Ball Bearing) －
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Flutter,
irregular
noise
generated
-
Replacement
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