Johnson Service Bulletin SB-792 - Connecting Rod Screw Torque

July 1, 1960. Factory torque specifications for forged-steel connecting rod screws used on 1960 and earlier Johnson engines, including five screw part numbers and three screw sizes.

Johnson Motors Service Bulletin letterhead
July 1, 1960
Bulletin No. SB-792
Subject; CONNECTING ROD SCREW TORQUE
At the present time there are three sizes of screws used on the
various forged steel connecting rods commonly serviced on 1960 and
earlier engines. In order that these screws can perform their
proper function, it is important that they be tightened to their
proper torque value.
The three sizes used and their proper torque are as follows:
PART NO.DESCRIPTIONSIZEFT./LBSINCH/LBS.
202967Screw1/4" x 2815 - 15½180 - 186
307212Screw9/32" x 2818 - 18½216 - 222
553761Screw9/32" x 2818 - 18½216 - 222
307409Screw5/16" x 2429 - 31348 - 372
307760Screw5/16" x 2429 - 31348 - 372
Check the screw size when servicing connecting rods and use the proper
torque value for maximum holding power.
JOHNSON MOTORS
W. W. DeWees
W. W. DeWees Service Department
WWD:eb
NOTE: Post on your Miscellaneous index.
W A U K E G A N, I L L I N O I S

For other Johnson factory service information from this period, see the pre-1969 service bulletin library.