Johnson J10RLSRD Service Manual page 211

POWERHEAD
ASSEMBLY - 25/30
Thoroughly clean and degrease the mating
flanges of the crankcase and cylinder block with
Cleaning Solvent and let air dry.
Apply Locquic Primer to the mating flanges of the
cylinder block and crankcase and let air dry.
Apply a thin, even coat of Gel-Seal II sealant to
the cylinder block flange. The application must not
come within 1/4 in. (6.4 mm) of the labyrinth seals
or bearings.
IMPORTANT:
Gel-Seal II has a shelf life of at
least one year when stored at room temperature.
Test the Gel-Seal II or replace it if the age of the
tube can not be determined. Using old Gel-Seal II
could cause crankcase air leaks.
Lower the crankcase into place.
Lightly coat threads of the six main bearing
screws with Gel-Seal II. Install the screws finger
tight.
When the crankcase is seated, install and firmly
seat the crankcase taper pin.
Install crankcase flange screws finger tight.
Using a soft face mallet, lightly tap bottom of the
crankshaft to seat the lower main bearing . Check
for binding between the crankshaft and the bear-
210
ings on the connecting rods by rotating the crank-
shaft with the flywheel.
Lightly coat the machined mating surface of the
crankcase head with Gasket Sealing Compound.
Lubricate a new crankcase head O-ring with Tri-
ple-Guard grease and install it. Install the lower
crankcase head. Lightly coat the threads of three
new crankcase head screws with Gasket Sealing
Compound and install them finger tight.
Starting with the center screws, tighten the six
main bearing screws and torque 168 to 192 in.
Ibs. (19 to 22 N·m) . Starting with the center