Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 471Get this manual
6Position gear housing so that the drive shaft is protruding into drive shaft housing7Feed speedometer tube through opening in drive shaft housing IMPORTANT: If shifting operation is not as described, preceding, the gear housing must be removed and the cause corrected14Install remaining washers and nuts onto drive shaft studsTorque to 55 lbft(74.5 Nm)15Torque bolt (started in Step 10) to 45 lbft(61.0 Nm)16Position trim tab in gear housing aligning grooves of trim tab with ribs in trim tab pocketAdjust to position in which it had previously been installed, and while holding trim tab, torque bolt to 40 lbft(54.0 Nm)17Install plastic cap into trim tab bolt opening at rear edge of drive shaft housing
NOTE: If, while performing Step 8, the drive shaft splines will not align with crankshaft splines, lower the gear case enough to reach in and turn the drive shaft by hand slightly to align drive shaft splines with crankshaft
8Move gear housing up toward drive shaft housing
while aligning shift shaft splines and water tube with water tube guide (in water pump cover)9Place flat washers onto studs (located on either side of drive housing)Start nut on these studs and tighten finger-tight10Start bolt at of gear housing inside trim tab recessDO NOT tighten bolt at this time11Recheck shift shaft spline engagement and correct if necessaryIMPORTANT: Do not force gear case up into place with attaching nuts12Evenly tighten nuts which were started in Step 9Torque to 55 lbft(74.5 Nm)13After nuts (located on either side of drive shaft housing) are tightened, check shift operation as follows: aPlace guide block anchor pin into FORWARD gear positionRotate flywheel clockwise (viewed from top); propeller shaft should rotate counterclockwise