Adjustments - Honda HARMONY H1011R Owner's Manual

MAINTENANCE & ADJUSTMENTS
Spilled fuel not only creates a fire hazard, it can cause
environmental damage. Wipe up spills immediately. Dispose
of gasoline properly.
Fuel Recommendation
Honda recommends unleaded fuel (86 pump octane)
because it produces fewer engine and spark plug deposits
and extends exhaust system life.
Be sure the gasoline you use is as fresh as possible. Stale
or contaminated gasoline or an oil/gasoline mixture can
damage the engine or its fuel system. Avojd getting dirt or
water in the fuel tank.
When the engine speed drops under heavy loads, you may
hear light "spark knock" or "pinging" (a metallic rapping
noise). This is no cause for concern.
However, if this spark knock or pinging occurs at a steady
engine speed, under a normal load, the engine can be
damaged. Try using fresh gasoline in the tank or change
brands of gasoline. If spark knock or pinging persists,
contact your authorized Honda riding mower dealer.
Running the engine with persistent spark knock or pinging
can cause engine damage. This type of damage is not
covered by the Distributor's Limited Warranty.
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