1983 Yamaha 30EN Outboards Service Manual, Page 62Get this manual
2 Remove the two dowel pins from the crankcase or cylinder bodyCover the pins with rags to protect them against damage when holding with pliers
Piston pins and pistons 1Remove the piston pin clip from the piston2 Remove the other piston pin clip, and push out the piston pin
NOTE: 1the piston pin has been removed, the small-end bearing needles fall offKeep them together so that they will not be lost2The pistons and bearing needles should be put aside separately for the upper and lower cylinders