1991 Yamaha Outboard Factory Service Manual 9.9 and 15 HP, Page 64Get this manual
Oil seal housing NOTE: When press-fitting the oil seal, be sure that it faces in the correct direction 1Using the jig, press-fit the two oil seals
(smaller in outside diameter) one by one
6Place washers on both sides of the small
end, insert the piston pin into the small end so that the jig is pushed out, then push the pin into the opposite side piston pin hole
-l!c;;bl-!1Piston 4Piston pin 2Con-rod 5Needle bearing 3Washer
2Using the jig, press-fit the oil seal (larger