1971 Johnson 125HP outboards Service Manual, Page 53Get this manual
Figure 5-14Removing Crankshaft
Figure 5-15Removing Crankcase Head Seal
cRemove the upper crankcase head from the crankshaftTo remove seal, insert punch through bottom of bearing to engage seal lip, and drive seal out with hammerSee Figure 5-15DO NOTreuse sealTo remove bearing, press out from top side of crankcase head with arbor pressBEARING HEAD
dRemove four screws (lower crankshaft head to lower bearing retainer plate) and remove lower crankcase head from crankshaftSee Figure 5-16eInspect ball bearing at lower end of crankshaft and remove if damagedUse Truarc pliers No4 (Special Tool #307429) to remove retaining ring under bearingUse flywheel puller (Special Tool #378103) provided with four screws 1 4-28 3" long, and threading the screws into the tapped holes in the bearing retainer plateSee Figure 5-17fThe center journal needle bearing may be removed by remOving the retaining ring, and separating the two halves of the bearingSee Figure 5-18