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Models K241, K301, K321 And K341
Rope Start
A. Install the nylon grass screen.
B. Install the spacer, rope pulley, plain washer,
and hex cap screw (lubricate threads with oil) .
Hold the flywheel with a strap wrench and
torque hex cap screw to 35/40
ft.
lb. If a hex
nut is used, torque to 50/60
ft.
lb.
C. Install the wire mesh grass screen and grass
screen retainer to rope pulley.
Retractable Start
A. Install the grass screen.
B. Install the drive cup, plain washer, and hex
cap screw (lubricate threads with oil). Hold the
flywheel with a strap wrench and torque hex
cap screw to 35/40
ft.
lb. If a hex nut is used,
torque to 50/60
ft.
lb.
Electric Start
A. Install the plain washer and hex cap screw (lu-
bricate threads with oil) . Hold the flywheel with
a strap wrench and torque hex cap screw to
35/40
ft.
lb. If a hex nut is used, torque to
50/60
ft.
lb.
B. Install the grass screen.
3.
For all models, torque the grass screen fas-
teners to 70/140 in. lb. for a metal grass
screen and 20/30 in. lb. for a plastic grass
screen.
INSTALL BLOWER HOUSING
1 . Install the spark plug lead and kill lead into the
slots in the baffle.
2.
Install the remaining self-tapping screws and
the blower housing.
NOTE: On some models, the grass screen must
be installed before installing the blower housing.
3.
Install push rod, breaker assembly, and
breaker point lead.
4.
Set breaker point gap at .020" full open.
5.
Install gasket and breaker point cover.
12.16
INSTALL CYLINDER HEAD AND SPARK
PLUG
1 . Install the gasket and cylinder head. Always
use a new gasket when head has been re-
moved for service work.
2. Torque the hex cap screws and hex nuts (in
increments) in the sequence and torques
shown in Figure 12-44.
NOTE: The importance of torquing cylinder head
bolts to specified values and following the recom-
mended sequences cannot be overemphasized.
Blown head gaskets and cylinder head distortion
may result from improper torquing.
Following is the recommended torquing procedure:
1 . Lubricate the cylinder head bolts with oil be-
fore installation.
2.
Initially torque each bolt to 10 ft. lbs following
the recommended torque sequence.
3.
Sequentially tighten each bolt in 1 0 ft. lb. in-
crements until the specified torque values are
reached.
NOTE: After reaching the final torque value, run
the engine for 15 minutes, stop, and allow to cool.
Then, sequentially retorque the head bolts to the
specified torque value.
4.
Make sure the spark plug is properly gapped.
5.
Install the spark plug and torque it to 18/22
ft.
lb.
INSTALL BREATHER ASSEMBLY
1. Install the stud, gasket, breather plate, reed,
reed stop, seal, and filter. The accompanying
illustrations show the correct order of assem-
bly for two types of breather assemblies. Make
sure reed valve is installed properly and that
oil drain hole on breather plate is down. Refer
to Figures 12-45 and 12-46.
NOTE: All K181 Specifications have been changed
to call for 2 pieces of breather filter 231419 in-
stead of 1. Testing has revealed the use of two
filters prevents oil droplets from being expelled
through the breather system. All K181 engines are
now being built with two filters and when serviced,
two should always be used.
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