2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 189Get this manual
POWERHEAD DISASSEMBLY Remove the retaining screws and remove the lower crankcase headUse 18 indiameter pin punch to push crankcase taper pin toward intake manifold surface
IMPORTANT: Do not use tapered punch or any other tool that could jam in or damage the taper bore when removing the pin
Remove the lower crankcase head seal using Puller Bridge, PIN 432127, and Small Puller, PIN 432131Discard seal and O-ring