TOHATSU 40 Service Manual page 111

9. Degrease the crankcase flange and mating surface of the
47
cylinder block. Apply anaerobic gasket maker to the cylinder
block flange. The application must cover the flange evenly and not
be excessive.
10. Install crankcase on cylinder block. Ensure the following:
48
• All dowel pins in cylinder block are properly aligned in the
crankcase.
• All main bearing nocks are seated in the crankcase notches.
11. Install crankcase mounting bolts and torque to specification:
Install and torque the largest size bolts first. Start
with the bolts closest to the center of the crankcase
and work outward.
Cylinder Head
12. Lightly coat both sides of new cylinder head gasket and
49
cylinder head cover gasket with high temperature gasket
dressing. Install the gaskets.
13. Install the cylinder head, cylinder head cover, and overheat sensor
(if equipped). Torque the bolts to specification.
50
Apply light coat of dielectric lubricant to sensor
before installation.
On models 40 and 50, torque the cylinder head M6
bolts first, starting with those nearest the center of
the cylinder head and working outward. Torque the
M8 bolts in order from lowest embossed number to
highest.
On models 60, 70, 80, 90, 115, 120, and 100, torque
all bolts in order from lowest embossed number to
highest.
14. Install thermostat and torque thermostat cap bolts to specification.
See Thermostat, this section.
3-/ 4-Cylinder
NOTE
NOTE
NOTE
NOTE
POWERHEAD
T1245
T1246
T1247
T1248
4-37