1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 210Get this manual
2Apply OMC Gasket Sealing Compound to the threads of the single shorter mounting screw Install the screw into the hole in the exhaust passage of the extensionTighten the screw to 192-216 in Ibs(22-25 Nm)Remove the two alignment screws
3Coat the driveshaft splines with OMC Moly LubeDo not coat top surface of the driveshaft as the lubricant here may prevent seating of the driveshaft in the crankshaftCoat upper shift rod with OMC Triple-Guard grease4Temporarily install the upper shift rod connector on the gearcase lower shift rodInstallation of the gearcase will not allow the upper shift rod connector to be installed at later time
5Apply OMC Gasket Sealing Compound to two of the long gearcase extension screwsInstall these screws into the two middle screw holes of the gearcase before the gearcase is installedTheir length will not allow access past the anti-ventilation plate once the gearcase is installedInstall the gearcase onto the extensionSee that the driveshaft engages the crankshaftRotate the flywheel, if necessary