Husqvarna CRT48-33K, Operator'S Manual

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Emission Control Systems Information and Warranty—Gasoline
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8 Emission Control Systems Information and Warranty
—
Gasoline
The Emission Control Warranty and associated information is valid only for the
U.S.A., its territories, and Canada.
8.1 Emission Control System Background Information
Introduction
Wacker Neuson spark-ignited engines/equipment must conform with applicable
Environmental Protection Agency (EPA) and the State of California emissions
regulations. There are two types of emissions that fall under these regulations: 1)
exhaust, and 2) evaporative. These regulations require that manufacturers warrant
the emission control systems for defects in materials and workmanship.
Furthermore, EPA and California regulations require all manufacturers to furnish
written instructions describing how to operate and maintain the engines/equipment
including the emission control systems. This information is provided with all
Wacker Neuson engines/equipment at the time of purchase.
Exhaust emissions
The combustion process produces carbon monoxide, oxides of nitrogen, and
hydrocarbons. Control of hydrocarbons and oxides of nitrogen is very important
because, under certain conditions, they react to form photochemical smog when
subjected to sunlight. Carbon monoxide does not react in the same way, but it is
toxic.
Wacker Neuson utilizes lean carburetor settings and other systems to reduce the
emissions of carbon monoxide, oxides of nitrogen, and hydrocarbons.
Evaporative emissions
Evaporative emissions are fuel emissions and generally include emissions that
result from permeation of fuel through the fuel-system materials or from ventilation
of the fuel system.
Wacker Neuson utilizes low-permeation fuel lines and fuel tanks where applicable
to reduce evaporative emissions.
Problems that may affect emissions
If any of the following symptoms arise, have the engine/equipment inspected and
repaired by a Wacker Neuson dealer/service center.

Hard starting or stalling after starting

Rough idling

Misfiring or backfiring under load

Afterburning (backfiring)

Presence of black exhaust smoke during operation

High fuel consumption