Johnson Service Bulletin 641 - Tool for Installing Fastener 305670

Issued April 4, 1958, this Johnson Motors bulletin describes a homemade screwdriver-based tool for installing nylon fasteners on RDS and V-4 engine shroud appliques. The original tool and installation photographs are reproduced below.

Johnson Motors gray Service Bulletin letterheadTwo factory photographs of the modified screwdriver installation toolFactory photograph demonstrating the fastener installation tool
April 4, 1958
TOOL FOR INSTALLING #305670 FASTENER
SERVICE BULLETIN #641
Shown here is a do it yourself tool that can be a real time saver when installing nylon fasteners to hold the appliques on RDS and V-4 shrouds.
USING AN ORDINARY SCREW DRIVER APPLY HEAT TO THE DRIVE END AND BEND AT A 40° ANGLE. DRILL A 1/8 INCH HOLE AS ILLUSTRATED.
The proper procedure for installing the nylon fasteners is as follows:
1. Soak nylon fastener in 180° temperature water until pliable.
2. Place fastener over applique pin.
3. Place hole in tool over pin and fastener, apply steady pressure on fastener until properly seated in locking notch on applique pin.
JOHNSON MOTORS
Walter McCleod Service Department
WM:lw

Parts and service reference

Factory fastener number 305670. The bulletin calls for a screwdriver bent to approximately 40 degrees with a 1/8-inch hole, and softening the nylon fastener in 180-degree water before installation.