Kohler Command PRO CH740NG [21/88] Fuel system

Fuel System

24 690 30 Rev. D KohlerEngines.com

External Fuel System Components

A Carburetor B Governor Lever C

Electronic Throttle

Control

D Hose Clamp

E Vacuum Line F Vaporizer G Fuel Line H Electric Lock-Off/Filter

I Regulator J Regulator Bracket

Typical LPG/NG fuel systems and related components

include:

● Fuel Tank (Liquid Withdrawal) (LPG only)

● Electric Lock-Off/Filter Assembly

● Vaporizer (LPG only)

● Regulator (Combination Primary/Secondary/Vacuum

Lock-Off)

● Carburetor

● High Pressure Fuel Line(s) (LPG only)

● Vacuum Line

LPG/NG fuel travels through fuel line to electric lock-off/

ﬁ lter assembly. Lock-off opens internally when key switch

is turned ON, permitting ﬁ ltered fuel to ﬂ ow. A vaporizer

(LPG only) is mounted in ﬂ ow of discharged cooling air.

It absorbs heat from cooling air and transfers it to fuel,

changing liqueﬁ ed petroleum to a vapor or gaseous

state, while partially stepping down fuel pressure. Gas/

vapor ﬂ ows under this decreased pressure to regulator

where it is further reduced to a usable, regulated

pressure. Regulator, activated by intake manifold

vacuum, controls fuel ﬂ ow to carburetor. In venturi of

carburetor, fuel vapor is mixed with incoming air from air

cleaner in correct ratio for efﬁ cient combustion.

FUEL RECOMMENDATIONS

Refer to Maintenance.

FUEL LINE

Low permeation fuel line must be installed on carbureted

Kohler Co. engines to maintain EPA and CARB

regulatory compliance.