Kohler K91 Service Manual page 133

Models K241 , K301 , K321 And K341
Rope Start
A . Install the nylon g rass 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
nut is use d , torque to 50/60
C . Install the wire mesh grass screen and grass
screen retainer to rope pulley .
Retracta ble Sta rt
A . Install t h e grass screen .
B . I nstall the drive c u p , plain washer , a n d hex
cap screw (lu bricate threads with oil) . Hold the
flywheel with a strap wrench and torque hex
cap screw to 35/40
torque to 50/60 ft. l b .
Electric Start
A . I nstall t h e plain washer a n d hex c a p 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 n ut is used . torque to
50/60 ft. lb.
B . Install the g rass screen .
3 .
For all models , torque the grass screen fas­
teners to 70/ 1 40 i n . l b .
screen and 20/30 i n . lb.
screen .
I NSTALL BLOWER HOUSING
1 . I nsta l l the spark plug lead and kill lead into the
slots i n the baffle .
2 . I nstall the remaining self-tapping screws and
the blower housing .
NOTE : On some models , the g rass screen rnust
be installed before installing the blower housing .
3 . Install push rod , breaker assembly , and
breaker point lead .
4 . Set breaker point g a p a t . 020 " full ope n .
5 . Install gasket and breaker point cover .
1 2. 1 6
ft. l b . If a hex
ft. l b .
ft. lb. If a hex nut is used ,
for a metal grass
for a plastic grass
INSTALL CYLINDER H EA D AND S PARK
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) i n the sequence and torques
shown i n Figure 1 2-44 .
NOTE : The i mportance of torquing cylinder head
bolts to specified values and following the recom­
mended sequences cannot be overemphasized .
Blown head g askets 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 i nstallation .
2 . Initially torque each bolt to 1 0 ft . Ibs following
the recom mended torq ue 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 1 5 minutes , sto p , and allow to cool .
Then, sequentially retorque the head bolts to the
specified torque value.
4 . M ake sure the spark plug i s properly gapped .
5 . I nstall t h e spark p l u g a n d torque i t to 1 8 /22
l b .
I NSTALL B R EATHE R ASSEMBLY
1 . I nstall the stud , gasket , breather plate , reed ,
reed sto p , sea l , and filter. The accompanying
i l lustrations show the correct order of assem­
bly for two types of breather assemblies . Make
sure reed valve is i nstalled properly and that
oil drain hole on breather plate is dow n . Refer
to Figures 1 2-45 and 1 2-46 .
NOTE : All K 1 8 1 Specifications have been changed
to call for 2 pieces of breather filter 23 1 4 1 9 in­
stead of 1 . Testing has revealed the use of two
filters prevents oil droplets from being expelled
through the breather system . All K1 8 1 engines are
now being built with two filters and when serviced ,
two should always be used .
ft.