Mercury Optimax 115 Service Manual page 456

Gear Lubricant Filling Instructions
1. Remove any gasket material from "Fill" and "Vent" screws and gear housing.
2. Install new gaskets on "Fill" and "Vent" screws.
IMPORTANT: Never apply lubricant to gear housing without first removing "Vent"
screw, or gear housing cannot be filled because of trapped air. Fill gear housing
ONLY when housing is in a vertical position.
3. Slowly fill housing thru "Fill" hole with Quicksilver Super Duty Lower Unit Lubricant un-
til lubricant flows out of "Vent" hole and no air bubbles are visible.
4. Install "Vent" screw into "Vent" hole.
IMPORTANT: DO NOT lose more than one fluid ounce (30cc) of gear lubricant while
reinstalling "Fill" screw.
5. 5. Remove grease tube (or hose) from "Fill" hole and quickly install "Fill" screw into
"Fill" hole.
Installing Gear Housing to Driveshaft Housing
Disconnect high tension leads from spark plugs and remove spark plugs from
engine before installing gear housing onto driveshaft housing.
1. Tilt engine to full up position and engage the tilt lock lever.
2. Apply a light coat of Quicksilver 2-4-C w/Teflon Marine Lubricant onto driveshaft
splines.
DO NOT allow lubricant on top of driveshaft. Excess lubricant, that is trapped in
clearance space, will not allow driveshaft to fully engage with crankshaft. Subse-
quently, tightening the gear housing nuts (while excess lubricant is on top of dri-
veshaft) will load the driveshaft/crankshaft and damage either or both the power-
head and gear housing. Top of driveshaft is to be wiped free of lubricant.
3. Apply a light coat of Quicksilver 2-4-C w/Teflon Marine Lubricant onto shift shaft
splines. (DO NOT allow lubricant on top of shift shaft.)
4. Apply a thin bead of G.E. Silicone Sealer (92-90113--2) against the top of divider
block.
5. Insert trim tab bolt into hole in rear of gear housing to driveshaft housing machined
surface.
6. Shift gear housing into forward gear and place guide block anchor pin into forward
gear position.
a -
90-855347R1 JANUARY 1999
Guide Block Anchor Pin
WARNING
CAUTION
a
51900
LEFT HAND NON-RATCHETING
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