Johnson 379241 - Puller Jaw Set
Factory tool number: 379241 (0379241)
Tool type: Removable puller jaw set
Application: Removal of the forward electro-magnet on Johnson 40 HP and 75 HP engines
Factory documentation: Service Bulletin SB-927, November 15, 1962 See also SB-923 - original jaw set introduction and assembly instructions.
Johnson's 379241 puller jaw set consists of two jaws retained in a puller body by roll pins. SB-927 describes a factory modification to improve clearance and engagement when removing the 75 HP forward electro-magnet. The original jaw tips could break because they did not fully engage behind the magnet. The bulletin notes that this issue did not occur on the 40 HP application.
SB-923 identifies this jaw set as an accessory for puller assembly 378450. Dealers removed the original jaws and fitted 379241 using the special hardened retaining pin supplied with the set. The factory listed the jaw set at $5.25 dealer net in September 1962.
Factory illustration - modified jaw
Factory modification instructions
- Drive out the roll pin holding each jaw to the puller body.
- Grind an approximately 1/16-inch-deep arc near the tip of both jaws, at location A in Figure 1.
- Grind a 1/16-inch taper at the heel of both jaws, at location B, to improve initial spread and jaw engagement.
Johnson stated that all 379241 jaw sets remaining in factory stock were being modified. Sets already modified when received by dealers required no further alteration.
Identification note: 379241 is the jaw set, not an independently verified part number for the complete puller body. SB-927 does not identify a separate puller-body number.
Related service bulletin
SB-927 - Modification of Special Tool 379241 Puller Jaw Set (November 15, 1962). The original bulletin provides the authoritative illustration and instructions.