Honda HRM215PDA Harmony Owner's Manual page 43

MAINTENANCE & ADJUSTMENTS
Tampering and altering
Tampering with or altering the emission control system may
increase emissions beyond the design limit. Among those acts
that constitute tampering are:
l
Removal or alteration of any part of the intake or exhaust systems.
l
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 authorized Honda engine
dealer.
l
Hard starting or stalling after starting
l
Rough idle.
l
Misfiring or backfiring under load.
l
Afterburning (backfiring).
l
Black exhaust smoke or high fuel consumption.
36