Owner's Manual

EMISSION CONTROL SYSTEM INFORMATION
Source of 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.
Honda utilizes lean carburetor settings and other systems to reduce the emissions of carbon monoxide, oxides of nitrogen, and
hydrocarbons.
The U.S and California Clean Air Acts
EPA and California regulations require all manufacturers to furnish written instructions describing the operation and maintenance
of emission control systems.
The following instructions and procedures must be followed in order to keep the emissions from your Honda engine within the
emission standards.
Tampering and Altering
Tampering with or altering the emission control system may increase emissions beyond the legal limit. Among those acts that
constitute tampering are:
• Removal or alteration of any part of the intake, fuel, or exhaust systems.
• Altering or defeating the governor linkage or speed-adjusting mechanism to cause the engine to operate outside its design
parameters.
Problems that may Affect Emissions
If you are aware of any of the following symptoms, have your engine inspected and repaired by your servicing dealer.
• Hard starting or stalling after starting.
• Rough idle.
• Misfiring or backfiring under load.
• Afterburning (backfiring).
• Black exhaust smoke or high fuel consumption.
Replacement Parts
The emission control systems on your new Honda engine were designed, built, and certified to conform with EPA and California
emission regulations. We recommend the use of genuine Honda parts whenever you have maintenance done. These
original-design replacement parts are manufactured to the same standards as the original parts, so you can be confident of their
performance. The use of replacement parts that are not of the original design and quality may impair the effectiveness of your
emission control system.
A manufacturer of an aftermarket part assumes the responsibility that the part will not adversely affect emission performance. The
manufacturer or rebuilder of the part must certify that use of the part will not result in a failure of the engine to comply with
emission regulations.
Maintenance
Follow the maintenance schedule on page 18. Remember that this schedule is based on the assumption that your machine will
be used for its designed purpose. Sustained high-load or high-temperature operation, or use in unusually wet or dusty conditions,
will require more frequent service.
TECHNICAL & CONSUMER INFORMATION
46 FG100 TILLER