Kohler PRO 3.7 Owner's Manual page 14

8.6 Oil Recommendations
All-season KOHLER ® PRO 10W-50 Synthetic Oil is the ideal
oil for KOHLER engines. It is specifically formulated to
extend the oil change interval to 300 Hours. Contact your
Kohler authorized dealer for availability.
300-Hour oil change intervals are exclusive to and only
authorized on KOHLER engines that utilize the KOHLER
PRO 10W-50 Synthetic Oil. Alternative engine oils may be
used with KOHLER engines but require 100-Hour oil change
intervals for proper maintenance. Oil must be API (American
Petroleum Institute) service class SJ or higher. Select
viscosity based on air temperature at time of operation as
shown in Figure 2.
8.7 Fuel Recommendations
E15, E20 and E85 are NOT approved and should NOT be used; effects of old, stale or contaminated fuel are not warrantable.
Fuel must meet these requirements:

Clean, fresh, unleaded gasoline.

Octane rating of 87(R+M)/2 or higher.

Research Octane Number (RON) 90 octane minimum.

Gasoline up to 10% ethyl alcohol, 90% unleaded is acceptable.

Methyl Tertiary Butyl Ether (MTBE) and unleaded gasoline blend (max 15% MTBE by volume) are approved.

Do not add oil to gasoline.

Do not overfill fuel tank.

Do not use gasoline older than 30 days.
8.8 Circuit breaker
Generator set's electrical circuit is protected by one or more magnetothermal, differential or thermal cut-out switches. If an overload
and/or short circuit occurs, supply of electrical energy may be cut.
If necessary, replace circuit breaker (A) in generator set with circuit breakers with identical nominal ratings and specifications.
8.9 DisCOver – Carbon Monoxide (CO) Shutdown System
CO Sensor automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a
CO sensor fault occurs. After shutdown, the CO sensor indicator light (A16) will blink for at least five minutes per the chart below.
CO sensor DOES NOT replace carbon monoxide alarms.
Install battery-powered carbon monoxide alarm(s) in your home. Don't run generator in enclosed areas.
Color Description
Carbon monoxide accumulated around the generator. Prior to restarting move the generator to an open, outdoor area 20 ft. (6
m) from occupied spaces with exhaust pointed away. Air out premises (open windows and doors) before reoccupying property.
Red Automatic shutoff is an indication generator was improperly located.
If you start to feel sick, dizzy, weak, or your home's carbon monoxide alarm sounds while using this product, get to fresh air
right away. Call emergency services. You may have carbon monoxide poisoning.
Yellow CO Sensor fault occurred.*
* Yellow light will blink for five seconds at the startup of the generator to show the CO sensor functioning properly.
8.10 Specifications
Specifications
Model
Overall Dimensions
(L x W x H)
Dry Weight
AC Rated Power
AC Maximum Power
DC Rated Power
Bore
Stroke
Displacement
Oil Capacity (Refll)
Maximum Angle of Operation (@ full oil level)*
Run Time
Fuel
Fuel Tank Capacity
Spark Plug Gap
* Exceeding maximum angle of operation may cause engine damage from insufficient lubrication.
Additional specification information can be found at KohlerPower.com.
10
5W-30
°F -20 0
°C -30 -20
Figure 2 Oil Recommendations
PRO 3.7
24.8 in. (630 mm) x
19.6 in. (498 mm) x
20.6 in. (523 mm)
133.6 lbs. (60.6 kg)
(120 Volts x
25.0 Amps)
3000
Watt
(240 Volts x
12.5 Amps)
(120 Volts x
30.8 Amps)
3700
Watt
(240 Volts x
15.4 Amps)
100 Watt (12 Volts x 8.3 Amps)
2.8 in. (70 mm)
2.1 in. (54 mm)
12.7 cu. in. (208 cc)
0.63 U.S. qt. (0.60 L)
25°
>8 hours (50% load)
See Fuel Recommendations section
3.4 gal. (13.0 L)
0.03 in. (0.76 mm)
10W-30
SAE 30
20 32 40 50 60
-10 0 10 20
80 100
30 40
TP-7213 7/21