1974 Johnson 40 HP Outboard Motors Service Repair manual P/N JM-7407, Page 21Get this manual
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BUSHING
BOSS GASKETFLOAT BOW L
HI GH SPEED ORIFICE PLUG
SOL EN OID ASSEM BLY
Figure 3-8 Removing Orifice Plug
Figure 3-10 Carburetor Assembly