1996 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 145Get this manual
2 40280 DR3481
20When all pistons and connecting rods are assembled, install piston ring setsInstall each piston ring set on the piston that was used to test the ring clearances
INotel Be sure gap of ring fits squarely around dowel pin
INotel Before continuing, be certain all OMC Gel-Seal" sealant has been removed from the cylinder block and crankcase mating flangesIf traces of hardened OMC Gel-Seal" sealant are left, main bearing misalignment might occurRefer to Cleaning, this section
21Rotate cylinder block so that the cylinder head surface is facing up and horizontal to the floor
INote Use one the following ring compressor tools for inserting
the pistons into the block: 500 500 565 565 cc cc cc cc Standard: OMC PIN 342218 Oversize: OMC PIN 342219 Standard: OMC PIN 342220 Oversize: OMC PIN 342221