Zenoah HC510DV - Manual (Page 22)

22 
In case the fuel filter is clogged or the fuel pipe is
bent, engine speed may not increase or may
become unstable.
■ COOLING AIR PASSAGE
• Do not touch the cylinder, muffler or spark
plug by bare hands immediately after
stopping the engine. There is a danger of
burn for its high temperature.
• On the starting inspection, check the muffler
and clean if there are adhered wood chips or
dry leaves. Those may cause overheating of
the muffler. Also to avoid fire, keep clean the
muffler area.
This engine is an air cooling type. If cooling air inlet
or cylinder fins are choked with debris, the engine
may overheat and cause troubles. Check and
remove debris from time to time. (MA4)
(1) Air Inlet (2) Cylinder fin
• When the spark plug or air filter is removed for
cleaning, cover the fixing hole or the air inlet with
cloth to avoid dusts.
• The covers shall be reassembled correctly as
original. Failure in assembling may result in
irregular wear or damage of components by
machine vibrations.
■ BLADE DRIVE BELT
On the starting inspection, check tension and wear
status of a blade drive belt. Adjust or exchange it if
necessary.
Belt Tension
The belt is normal if it sags about 5mm by pushing
the belt outward with a finger. (MA5)
(1) Blade drive belt
IMPORTANT
WARNING
IMPORTANT
9. Maintenance
MA5
MA4