Service Procedure - Kohler K91 Owner's Manual

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PERFORM SERVICE AT INTERVALS INDICATED
( maintain in safe operating range) --
CHECK OIL LEVEL
CLEAN AIR INTAKE SCREEN
REPLE NISH FUEL SUPPLY
(Use API S ervice MS of proper weight) ---
CHANGE OIL
SERVICE FUEL FILTER (remove and clean sediment bowl)
(per i nstructi ons - P age
SERVICE AIR CLEANER
CHECK AIR CLEANER ELEMENT
(gap
SERVICE SPARK PLUG
SERVICE BREAKER POINTS
NOTE: I ntervals stated ar� for good, clean operating conditions -- perform services more frequently if
dusty or dirty condltions prevail.
PREVENTATIVE MAINTENANCE
important preventative maintenance steps that should be taken to keep engine in top condition.
the tools and instruments required for these additional steps are not available to the engine owner.
this reason, the engine should be returned periodically to an authorized Se�vice Center for complete
servicing and tune-up.
performance but, most important, in continued satisfactory operation during a long, trouble free,
service life.
LUBRICATING OIL
Oil Level: Check daily to make sure level is between L and F marks--level must not exceed "F" mark.
Oil Change: Change oil after first
intervals or more often in severe conditions.
Oil Type: Use only detergent type oils with API Service MS classification.
Guide (on cover) for proper weight.
engine under load immediately as this promotes final seating of the rings.
AIR CLEANER
Dry Type: Every hours, service by tapping element lightly against flat surface to remove loose
5 0
dirt--do not clean in any liquid or with compressed air.
extended up to hours if good clean operating conditions prevail.
200
when replacing element.
Oil Bath Type: Service at least every
with air hose. Lightly re-oil element after cleaning.
weight and grade as engine) to OIL LEVEL mark.
washer on cover then secure wing nut "finger tight".
COOLING SYSTEM
Keep air intake screen and cooling fins clean at all times.
ing or cooling shrouds removed as this will also cause overheating due to improper air circulation.
IGNITION SYSTEM
Spark Plug:
Every hours remove plug and check condition.
100
if plug has light coating of gray or tan deposit.
ing. A black (carbon) coating may indicate an
improper carburetor adjustment.
poor condition--best results are obtained with new plug.
on radio shielded plugs).
.020"
Breaker Points: Every
o r oily, clean with coarse cloth--do not use emery cloth or sandpaper.
dressed with point file--replace badly pitted or burned points.
are serviced or replaced since this setting establishes ignition timing.
hand until points are at maximum opening-- check with feeler gauge.
ing screw then shift movable plate until
sure proper gap is present when points are full open.

SERVICE PROCEDURE

(plus other external surfaces)
(Use clean, fresh fuel) -
3) -
- -
(dry type only)
- - ---
for gasolin e) ------- - - - --
.025"
) -
------- -
(gap .020"
- - ---
In addition to the routine services listed above, there are other
The benefits of such service will not only be noted immediately in improved
hours of operation on new engineuthereafter change at
5
Special oils are not required for new engines, however, place
hours.
25
"
overrich'fuel mixture caused by clogged air cleaner or
Do not sandblastJ, wire brush, scrape or otherwise service plug in
Tighten plug to
hours breaker points should be inspected and serviced.
500
gap is obtained.
020"
.
EACH EVERY
(X)
DAY HOURS
25
X
- -
- X
- - -- -
X
- - -
----
- - ---
X
- - -
--- - -
- X
- - --
- -
- -- -
- - - X
-
-- - -
- - ---- - -- -------
--- - -
- - -
-
---�- ----
- -
------
- - - ---- -- - -- -
-
- - - - -- -
Replace element after
Use only genuine Kohler parts
To service, swish element in solvent--do not dry
Drain and clean bowl then add new oil (same
After reinstalling serviced parts, place copper
Do not operate engine with blower hous­
Good operating conditions are indicated
A dead white, blistered coating could indicate overheat­
Set spark gap to
in. lbs. torque when installing.
324
The gap must be adjusted after points
To adjust, turn engine over by
If gap is not
After retightening screw, check to make
3
EVERY EVERY EVERY
HOURS
50 HOURS 100 500
-
X
--
- - -- X
- --- - --- -
- - - - X
- - - --- ---
Usually,
hour
25
See Temperature-Viscosity
hours--this can be
100
(or. for gas fuels ,
.025" 018"
If oxidized, dirty
Slightly pitted points can be
loosen adjust­
020",
..
HOURS
For