Os-engines 21XZ-B Manual do Utilizador descarregar pdf (Página 15)

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Dirt and dust may lodge in marked places.

5.Finally, when cleaning the exterior of the

engine, use methanol or a household

cleaning agent. Do not use gasoline,

kerosene, or any petroleum based chemical

which can damage silicone fuel tubing.

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CHECKING THE ENGINE

If the engine will not develop normal performance

after long time running due to wearing of parts.

It is suggested to replace necessary parts when

the following symptoms are detected.

Engine sound changes and easily overheats.

Power has dropped extremely.

Idle is unstable and/or engine tends to stop

at idle.

In most cases, ball bearings, cylinder & piston

assembly, connecting rod and/or crankcase have

become worn. Check the parts carefully and

replace them if necessary.

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