Kohler K91 Service Manual page 7

Change O i l
For a new engine , change o i l aft�r the first 5
hours of operation . Change oil every 25 hours of
operation thereafter .
For a n overhauled engine or o n e rebuilt with a new
shortblock or m iniblock, use straight 30-weight
Service Class SF or SG oil for the first 5 hours of
operation . C hange the oil after this initial run-in
period . Refill with Service Class SF or SG oil as
specified in the table. Change oil every 25 operat­
ing hours thereafter.
FUEL R ECOMMENDATIONS
£
WARNING:
Explosive Fuel!
Gasoline may be present in the carburetor and fuel
system. Gasoline is extremely flammable and it can
explode if ignited. Keep sparks, open flames, and
other sources of ignition away from the engine. Dis­
connect and ground the spark plug lead to prevent
the possibility of sparks from the ignition system.
Gene ral Recommendations
Pu rchase gasoline in small quantities and store in
clean, approved containers . A container with a ca­
pacity of gallons or less with a pouring spout is
2
recom mended . Such a container is easier to handle
and helps elim inate spoilage during refueling .
OIL REFILL QUANTITIES (U. S. STANDARD QUARTS)
K9 1 K 1 4 1 , K 1 6 1 , K 1 8 1
1 /2 Quart 1 Quart
(After refilling, always check oil level -- DO NOT OVERFILL)
* A-type oil pan capacity varies from 1 to 1 -3/4 quarts . On these add 1 quart of oil, check
leve l , then add oil as necessary to bring up to full level .
Do not use gasoline left over frorn the previous sea­
son, to minimize g u m deposits in your fuel system
and to insure easy starting .
Do not add oil to the gasoline.
Do not overfill the fuel tank. Leave room for the
fuel to expan d .
Fuel Type
For best results , use only clean , fresh , unleaded
gasoline with a pump sticker octane rating of 87 or
highe r .
should be 90 octane minimu m .
Unleaded gasoline i s recommended, a s it leaves
less combustion cham ber deposits . Leaded gaso­
line may be used in areas where unleaded is not
available and exhaust em issions are not regulated .
Be aware however, that the cylinder head will re­
quire more frequent service .
Gasoline /Alcohol blends
Gasohol (up to 1 0% ethyl alcoho l , 90% unleaded
gasoline by volume) is approved as a fuel for Kohler
engines . Other gasoline/alcohol blends are not ap­
proved .
Gasoline /Ether blends
Methyl Tertiary Butyl Ether (MTBE) and un leaded
gasoline blends (up to a maxi m u m of 1 5% MTBE by
vol ume) are approved as a fuel for Kohler engines .
Other gasoline/ether blends are not a pproved .
K24 1 , K30 1 , K32 1 , K34 1
2 Quarts
Figure 1 -4.
In countries using the Research method , it
K24 1 A , K30 1 A , K32 1 A , K34 1 A
1 Quart*
1 . 5