Kohler K91 Service Manual page 107

DIMENSION
(SEE FIG. 1 1 -5)
A S EAT ANGLE
B SEAT WIDTH
0 . 0 .
C INSERT
o
GUIDE DEPTH
1 . 0 .
E GUIDE
F VALVE HEAD DIA.
G VALVE FACE ANGLE
H VALVE S T E M DIA.
* 1 . 370" / 1 . 380' on all K341 en g ines and an y K321 with suffix "0" or later.
Hard starting , or loss of power accompanied by high
fuel consu m ption may be symptoms of faulty valves.
�
Ithough these symptoms could also be attributed to
worn rings , remove and check valves first . After re­
moval , clean valve head , face and stem with power
N o rma l : Even after long hours of operation a valve
can be reconditioned and reused if the face and
margin are in good s hape . If a valve is worn to
where the margin is less than 1 /32 " , do not reuse
it. The valve shown was in operation for almost
1 000 hours under controlled test conditions .
1 1 . 4
Model K9 1
Intake Exhaust
°
89 °
8 9
. 0371 . 045 . 0371 . 04 5
- --
-
- - . 972/ . 973
NONE NONE
NONE NONE
. 979/ . 989 . 8071 . 8 1 7
4 5 ° 45 °
. 2480/ . 2485 . 2460/ . 2465
I N TAKE
E X H A U S T
F i g u r e 1 1 -5.
Model K 1 6 1 , K 1 8 1
Intake Exhaust
° °
8 9 8 9
. 0371 . 045 . 0371 . 045
------
1 . 2535/1 . 2545
1 . 3 1 2 1 . 3 1 2
. 3 1 2/ . 3 1 3
. 3 1 2/ . 3 1 3
1 -3/8 1 - 1 /8
4 5 ° 4 5 °
. 3 1 05/ . 3 1 1 0 . 3090/ . 3095
Valve Deta i l s .
wire brush and then carefully inspect for defects such
as warped valve head , excessive corrosion or worn
stem end. Replace valves found to be in bad condi­
tion . A normal valve and valves in bad condition are
shown in the accompanying illustrations .
Bad Con d it i o n : The valve depicted here should be
replaced. The head is warped , the margin is dam­
aged and is too narrow . These conditions could be
attributed to excessive hours or a combination of
poor operating conditions.
M odel K241 ,
K321 , K341
I ntake Exhaust
° °
8 9 8 9
. 0371 . 045 . 037 1 . 045
----
-
- 1 . 2535/1 . 2545
1 . 586 1 .497
. 3 1 2 / . 3 1 3 . 3 1 2 / . 3 1 3
1 . 370/ 1 . 380 1 . 1 20 / 1 . 1 30 ·
45° 4 5 °
. 3 1 05/ . 31 1 0
. 30841 . 3091
V A l V E