Carburetor Modification For High Altitude Operation; Fuel Regulator Information - Honda GX620 Owner's Manual

TECHNICAL & CONSUMER INFORMATION

Carburetor Modification for High Altitude Operation

The LPG/NATURAL GAS-fueled engine does not require any
modifications for high-altitude operation. However, performance will
decrease at high altitudes.

Fuel Regulator Information

This engine is certified to comply with U.S. EPA and California ARB
emission regulations using the Impco Beam regulator specified in the
installation instructions (see below).
Honda used this regulator and other specific parts and adjustments to
demonstrate compliance with the emission regulations. Adjustable
fuel system parts must have U.S. EPA and California ARB approved
tamper resistant features to limit the available adjustment after the
fuel system is correctly installed.
If an equipment manufacturer did not install your engine in a product,
you will need the installation instructions for the Honda certified
system (see below).
If you choose not to use the Honda fuel system, you must use a
system that has been certified by the fuel system manufacturer to be
used on this Honda engine.
Or, if you use a fuel system that is not already certified, you must have
certification test data satisfactory to the U.S. EPA or California ARB.
The test data must prove the system will meet the emission standard
both when the engine is new and at the end of its emission durability
period (hours).
To obtain a copy of the installation instructions for this engine, contact
an independent Honda engine distributor, or our Customer Service
Department (page 43 ).
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