2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 197Get this manual
POWERHEAD ASSEMBLY Using Cone, PIN 318600, and Driver, PIN 318599, install new wrist pin retaining rings in each wrist pin holeGap of the retaining ring faces down away from notch in pistonpiston into the respective cylinder bore while guiding the connecting rod through the block
Cylinder Head
Lightly coat both sides of new cylinder head gasket with Gasket Sealing CompoundInstall the gasket and cylinder headInstall the cylinder head screws dryDo not use sealant on threadsTorque the cylinder head screws in stages 18 to 20 ftIbs(24 to 27 Nm) following the sequence shown
1Retaining ring gap 2Notch in piston