21
3
Fuel system
Symptom
Trouble Shooting Guide
Probable causes
Stop screw for the throttle not working
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Fuel tank/hose
Fuel filter blocked
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The fuel hose blocked
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Air in fuel ducts
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Incorrect/poor fuel
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Pump diaphragm
Vacuum pulse leakage
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Vacuum pulse duct blocked
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Loose screw(s) on the pump cover
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Faulty pump diaphragm
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Flow bellows
Flow bellows damaged
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The needle valve faulty
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Carburettor is not fitted correctly
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Faulty heat insulation seal
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Needle valve’s lever
Lever arm damaged
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Lever arm too high
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Lever arm too low
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Lever arm does not work correctly
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Needle valve’s spring
The spring is deformed
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The spring is not fitted correctly
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Control diaphragm
Diaphragm is damaged
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Faulty seal
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Needle valve
Valve jams
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Valve worn
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Foreign object in the valve guide
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Dif
ficult to start
Flooding, fuel leakage
Dif
ficult to prime when starting
Engine does not idle
Idles too slowly
Idling does not stabilise
Stops when idling
Engine does not accelerate
Engine stops when decelerating
Poor acceleration capacity
Poor performance at high speed
Starting
Low speed
Acceleration/
Deceleration
High speed
Содержание 324HDA
Страница 1: ...Workshop manual 324LX 324RX 324HDA English ...
Страница 25: ...24 3 Fuel system ...
Страница 33: ...32 5 Angle gear ...
Страница 45: ...44 7 Piston crankshaft and crankcase ...
Страница 49: ...2004W26 114 02 94 26 ...
