Service Tolerance And Clearances; Torque Data - Jacobsen J-125AS Service Manual

SECTION Ill - SERVICE D A T A - - - - - - - - - - - - - - - - - -
3. 3 SERVICE TOLERANCES AND CLEARANCES
Cylinder Bore
Piston Skirt Diameter
Piston Ring Width
Piston Pin Diameter
Piston Pin Bore in Piston
Piston Pin Bore in Rod
Crank Pin Diameter
Crank Pin Width
Conn. Rod Bore
Conn. Rod Crankpin Width
Spark Plug Gap
Mag. Point Gap
Timing in Degrees B. T. D. C.
Timing in Inches of Piston Travel B. T. D. C.
Piston Skirt to Cylinder Clearance
Maximum Wear Tolerance on Cylinder Bore
Maximum out of round Tolerance
Piston Ring End Gap
Piston Ring to Land Side Clearance
Piston Pin Clearance in Rod
Conn. Rod Clearance
Conn. _ R od Crankpin Side Clearance
a. J-175-V .0935
b. (
.00 2 ) J-175-V
( . 003)
*
Needle - Bearing Used.
3.4 TORQUE DATA
Head Bolts - 180 inch pounds all models
Connecting Rod - 70-75 inch pounds all models
J-125-H
J-100..,H
J-125-V
2.0015 2.0015
2.0010 2.0010
1. 9970 1. 9970
1. 9965
1. 9965
.0905 • 0905
.089
.089
• 50025 . 50025
.49975 • 49975
.5003 . 5003
. 5000
• 5000
·• 50125 • 50125
.50075 • 50075
• 6245 • 6235
• 6240 • 6230
.817 • 817
• 812 .812
• 627 . 627
• 626 • 626
.808 .808
. 800 • 800
.035 .035
.020
.020
30 ° 30°
.125 .125
.004 .004
.005 .005
.002 .002
.0015 .0015
.005
.005
.010 .010
.0035 .0035
.0055
.0055
.0005 .0005
.0015
.0015
.0015 . 0025
.003 .004
. 004 .004
.017 .017
All other bolts or studs in aluminum. Not to exceed 180 inch pounds .
12
J-175-H
J-175-V J-225-V
2.1265 2.2515
2.126 2.2510
2.1240 2.2480
2.1235 2.2475
a • .0625 .0925
• 0615 .0935
• 50025 • 50025
• 49975 • 49975
• 5003 • 5003
• 5000 -5000
• 5008 • 687
* ·
• 5015 • 688
• 7485
• 7503
• 748
.7500
.938
• 568
.933 • 563
• 7525
.9403 *
.07530 .9399
.929 .555
.921 • 550
.035 .035
.020
.020
28° 27°
.125 .125
.002 .003
.003 .004
.002 .002
.0015 • 0015
59-.005-.013
.005
60-.052-.060
.013
.004 .002
b. .006 .0035
.0005 Needle
.0017 Bre:s •
.0030 Needle
.0040
Brgs .
.004 .008
.017 .018