Chrysler 20 and 30 HP Outboard Motors Service Manual OB 3435, Page 25Get this manual
30 H.P.139 .129
PISTON RINGGAUGE DIA BOTTOM PISTON RINGGAUGE DIA
.50015 .50000
1.810 1.800
2.959 2.953 Diaover pins
PISTON PIN
1+-=2::;.9-=.83::::0=_ _.2:=.97:8::5c90 2.9815 2.9765 4.248 4.252 .0700 .0001 2.992 Diapins 2.500 .005 0645 .0655 2.9885 900 2.9865 .6874 .6877 1.4523 1.4528