1968 Evinrude Starflite 100 HP outboards Service Manual, Page 31Get this manual
dTwist the hook around to grasp the "0" ring, then pull outSee Figure 3-41 cPush the plunger down with the straight instrumentdPinch the "0" ring together and gently push into position with fingersWhen reassembling the fuel hose, check for cracks in the primer bulb or in the hoseThe primer bulb must be attached so that fuel flow is from the shorter to the longer hose lengthFuel flow through the primer bulb is indicated by an arrowSee Figure 3-42