Kohler COMMAND CH18-745 User Manual download pdf (Page 5)

1.4

Section 1

Safety and General Information

Oil Recommendations

Using the proper type and weight of oil in the crankcase

is extremely important. So is checking oil daily and

changing oil regularly. Failure to use the correct oil, or

using dirty oil, causes premature engine wear and failure.

Oil Type

Use high-quality detergent oil of API (American

Petroleum Institute) Service Class SG, SH, SJ or

higher. Select the viscosity based on the air temperature

at the time of operation as shown in the following table.

Fuel Recommendations

WARNING: Explosive Fuel!

Gasoline is extremely flammable and its vapors can

explode if ignited. Before servicing the fuel system,

make sure there are no sparks, open flames or other

sources of ignition nearby as these can ignite gasoline

vapors. Disconnect and ground the spark plug leads to

prevent the possibility of sparks from the ignition

system.

General Recommendations

Purchase gasoline in small quantities and store in

clean, approved containers. A container with a capacity

of 2 gallons or less with a pouring spout is

recommended. Such a container is easier to handle

and helps eliminate spillage during refueling.

Do not use gasoline left over from the previous

season, to minimize gum deposits in your fuel system

and to ensure easy starting.

Do not add oil to the gasoline.

Do not overfill the fuel tank. Leave room for the fuel to

expand.

Fuel Type

For best results, use only clean, fresh, unleaded

gasoline with a pump sticker octane rating of 87 or

higher. In countries using the Research method, it

should be 90 octane minimum.

Unleaded gasoline is recommended as it leaves less

combustion chamber deposits and reduces harmful

exhaust emissions. Leaded gasoline is not

recommended and must not be used on EFI engines,

or on other models where exhaust emissions are

regulated.

Gasoline/Alcohol blends

Gasohol (up to 10% ethyl alcohol, 90% unleaded

gasoline by volume) is approved as a fuel for Kohler

engines. Other gasoline/alcohol blends are not

approved.

Gasoline/Ether blends

Methyl Tertiary Butyl Ether (MTBE) and unleaded

gasoline blends (up to a maximum of 15% MTBE by

volume) are approved as a fuel for Kohler engines. Other

gasoline/ether blends are not approved.

NOTE: Using other than service class SG, SH, SJ or

higher oil or extending oil change intervals

longer than recommended can cause engine

damage.

NOTE: Synthetic oils meeting the listed classifications

may be used with oil changes performed at the

recommended intervals. However, to allow

piston rings to properly seat, a new or rebuilt

engine should be operated for at least 50 hours

using standard petroleum based oil before

switching to synthetic oil.

A logo or symbol on oil containers identifies the API

service class and SAE viscosity grade. See Figure 1-3.

Figure 1-3. Oil Container Logo.

Refer to Section 6 - “Lubrication System” for detailed

procedures on checking the oil, changing the oil and

changing the oil filter.

*Use of synthetic oil having 5W-20 or 5W-30 rating is

acceptable, up to 40°F.

**Synthetic oils will provide better starting in extreme

cold (below -10°F).

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