9. Maintenance
MA4
MA5
22
IMPORTANT
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
WARNING
•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 |
IMPORTANT
•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
