81
On models OHV 135 - 175 hold a 1/2"
wrench on the rocker arm bearing while
tightening the 5/32" Allen head set screw to
75 in. lbs. (8.5 Nm) of torque. Rotate the
crankshaft at least one full turn to check push
rod movement and valve lash (diag. 70).
Current production models OHV135 - 175 use
a 1/2" wrench to tighten the rocker arm
bearing to the correct valve lash. Once
adjusted use a 1/2" socket and torque the jam
nut to 130 inch pound (14.7 Nm). Rotate the
crankshaft one full turn to check push rod
movement and correct valve lash (diag. 71).
15. Install the rocker arm cover using a new
gasket or o-ring and tighten the screws to the
specified torque. Connect the breather hose
to the valve cover fitting on model OHH.
16. Attach the backing plates or baffles. Attach
the governor arm lever if removed.
17. Attach the alternator coil if applicable and
route the wires away from the flywheel area.
18. Install the flywheel spacer if applicable,
flywheel key, flywheel, starter cup (if
applicable), bevelled washer (concave surface
in), and flywheel nut. Use strap wrench part #
670305 to hold the flywheel and tighten the
nut to the specified torque.
19. Install the ignition module using a part #
670297 .0125" (.3175 mm) air gap tool
between the flywheel magnets and the
laminations of the module (diag. 72). Tighten
the mounting screws, remove the tool, and
check for contact while rotating the flywheel.
None should be found. Attach the ignition
ground lead to the module terminal.
20. Install the blower housing on all engines with
the speed control mounted on the blower
housing or engine block, and attach the
ignition groundout lead at the control if
applicable.
21. Install the intake pipe, speed control,
carburetor, and air cleaner assembly while
hooking the throttle and governor linkage.
Install the blower housing on all engines with
intake pipe mounted speed control brackets.
Check the governor and speed control hook-
up and adjustment - see Chapter 4 under
"Service".
.0125" (.3175 mm)
AIR GAP
72
OHV135 - 175
70
5/32"
ALLEN
WRENCH
1/2"
WRENCH
71
1/2"
WRENCH
1/2"
TORQUE
WRENCH
www.mymowerparts.com
For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983
To Next Page
