Chrysler 20 and 30 HP Outboard Motors Service Manual OB 3435, Page 148Get this manual
Figure 42Installing Connecting Rod, Piston Pin Figure 44Installing RingsDAMAGE (COMPRESSOR TOO LOOSE) RING COMPRESSOR
on one side onlyThis side of ring must face up toward top of piston Figure 43 BApply oil (SAE #30) to piston rings on piston
In next stepbe careful not to catch end of ring with inside end of compressor band
PISTON RING
BEVEL CUT (UP)
Figure 45Tightening Compressor
Figure 43Position of Piston Ring
DPosition piston so that intake baffle on piston is towards intake ports and push piston into cylinder Figure 46 3Install crankcase parting line seal in grooves in crankcase cover so that seal is flush with sides of bearing bores Figure 474Install crankshaft as follows :