honda-automobiles hrc216hxa User Manual

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 uses lean carburetor settings and other systems to reduce the 
emissions of carbon monoxide, oxides of nitrogen, and hydrocarbons.

EPA, California and Canadian regulations require all manufacturers to 
furnish written instruction describing the operation and maintenance of 
emission control systems.

The following instructions and procedures must be followed in order to 
keep the Honda engine emissions within the emission standards.

Tampering with or altering the emission control system may increase 
emissions beyond the legal limit. Some acts that constitute tampering:

•

Removal or alteration of any part of intake, fuel, or exhaust system.

•

Altering or defeating the governor linkage or speed-adjusting 
mechanism to cause the engine to operate outside its design 
parameters.

If you are aware of any of the following symptoms, have your engine 
inspected and repaired by your authorized Honda servicing dealer.

•

Hard starting or stalling after starting.

•

Rough idle.

•

Misfiring or backfiring under load.

•

Afterburning (backfiring).

•

Black exhaust smoke or high fuel consumption.