hecht 746 - Carbon Sediments; Fuel System; Engine Adjustments; Cleaning

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• Remove accumulated debris from muffler area and cylinder area.
• Make sure the muffler is without cracks, corrosion or other damage.
• If the exhaust system is fitted with a spark arrester, it must be kept clean and passive.
After removing the arrester and knocking out the coarse dirt, clean the arrester with
a fine brush (e.g. toothbrush) from all deposits. After cleaning, reassemble it.
CARBON SEDIMENTS
It is recommended to remove carbon sediments from cylinder, piston upper side and valves
surrounding each 100 – 300 operating hours in authorised service center.
FUEL SYSTEM
CAUTION! A
Spare parts of fuel system (plugs, hoses, tanks, filters etc.) must be the same as
original otherwise arises danger of fire.
• Regularly check the condition of fuel hoses.
• Replace the fuel hose every 2 years. If fuel leaks from fuel hose, replace the fuel hose
immediately.
REPLACEMENT O F FUEL FILTER
Do not use the machine without fuel filter in any case. Replace fuel filter regularly.
1. Drain off the fuel (pic. 10 A) from the tank to suitable container in the well ventilated place.
2. Draw out the fuel pipe from the tank by wire hook and remove it by turning.
3. Replace the fuel filter and fitted fuel pipe get back into the fuel tank.
ENGINE ADJUSTMENTS
CAUTION! A
Do not change in any way the rated speed of the engine (carburetor side or regulator side).
Your engine was adjusted in the factory. If the motor settings is changed in any way, the warranty will
be cancelled. If additional adjustment is necessary (eg. for high altitude), contact authorized service
center!
CLEANING
CAUTION! A
Do not hose engine. Water can damage engine or contaminate the fuel system.
• Carefully clean the machine after each use.
• If the engine has been running, allow it to cool for at least half an hour before cleaning.
• Clean all exterior surfaces.
• Wipe the surface of the machine and engine cover with dry cloth.
• Never use aggressive detergents or solvents for cleaning.
• If any of the parts of the machine is cleaned by water or a damp cloth, etc., it must be completely dry.