Chrysler 25 and 30 HP Outboard Motors Service Manual OB 1894, Page 88Get this manual
SECTION XIV (Cont AHeat pistons to approximately 200 Fprior to assembly to connecting rodBDrive piston pin in piston to secure connecting rod(Place match marks on connecting rods on intake side of piston CInstall retaining rings in groove on piston pin bore of piston using retaining ring pliers (Special Tool T1750)DInstall piston rings on piston using ring expander (Special Tool T8926)NOTE
compressor until rings are compressed sufficiently to enter cylinderNOTE
There are indentations at one end of ring compressorThese indentations are positioned on top of cylinder to prevent compressor from entering cylinderFPosition piston so that intake baffle on piston is towards intake ports or transfer port cover and push piston in cylinderRefer to figure 7GInstall connecting rod roller bearings as outlined in Section XIV, paragraph 16-2HComplete assembly as outlined in Section XIV, paragraph 15-218CYLI NDER ASSEMBLY 09-28