Oil Recommendations; Oil Type; Fuel Recommendations - Kohler CH640 Owner's Manual

Vaporizer
Oil Filter
Figure 1. Typical Command Horizontal Shaft LPG or LPG/NG Fueled Engine.

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. Using oil that is
incorrect or dirty can cause premature engine wear and
failure. Synthetic oil is recommended for use in LPG/
NG fueled engines because there is less oxidation or
thickening, and deposit accumulation on intake valves
is substantially reduced. Conventional petroleum-
based oil may be used, but valve service will be
required every 500 hours to remove the accumulated
deposits.

Oil Type

Use high quality, 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.
RE C O M M E ND ED SA E VI SC OS ITY G R A DES
*
5W-20, 5W-30
°F -20 0 20
°C -30 -20 -10
TEMPERATURE RANGE EXPECTED BEFORE NEXT OIL CHANGE
*Synthetic oils will provide bett er starting in extreme
cold below -23°C (-10°F).
Figure 2. Viscosity Grades Table.
4
Air Cleaner
Kohler 10W-30
10W-30
SAE 30
32 40 50 60 80 100
0 10 20 30
Dipstick
Electric Starter
NOTE: Using other than service class SG, SH, SJ or
higher oil or extending oil change intervals
longer than recommended can cause engine
damage.
A logo or symbol on oil containers identifi es the API
service class and SAE viscosity grade. See Figure 3.
Figure 3. Oil Container Logo.
Refer to Maintenance Instructions beginning on
page 8 for detailed oil check, oil change, and oil fi lter
change procedures.

Fuel Recommendations

CH640 and CH740 engines are certifi ed to operate on
LPG or NG.
40
CH730 engines are certifi ed to operate on LPG.
LPG Regulator
Oil Drain Plug