CAC Gasoline Engine Maintenance And Servicing Manual
74
10. Engine accelerates hesitately
Cause Correction
(1). Intake manifold or connecting hose
vacuum leaking service and check
(2). Fuel filter clogged replace fuel filter
(3). Fuel pump damaged. Or low fuel outlet pressure replace fuel pump
(4). Carburetor acceleration pump clogged or clean or replace accelerator pump
diaphragm diaphragm damaged
(5). Part-load fuel way clogged clean and service
(6). Spark plug corroded, damaged or
Spark plug gap abnormal replace spark plug
11.Engine speed is not as specified
Cause Correction
(1). Intake manifold or connecting hose vacuum leaking service and check
(2). Fuel filter blocked replace fuel filter
(3). Fuel pump damaged. Or low fuel outlet pressure replace fuel pump
(4). Fuel Tank ventilation pipe blocked or fuel hose
blocked dredge the hose
(5). Throttle valve not widely open adjust
(6). Choke not widely open or auto-choke damaged adjust or service
12. Engine power is not enough.
Cause Correction
(1). Incorrect Ignition timing check or adjust distributor
(2). Incorrect Timing belt assembly or adjust ‘teeth’ belt tension or tension
incorrect belt tension pulley.
(3). Carburetor float chamber level too low or check and clean carburetor float needle
fuel intake strainer blocked valve and strainer
(4). Throttle valve not widely open adjust
(5). Choke not widely open or auto-choke damaged adjust or service
(6). Fuel filter blocked replace
(7). Abnormal or too low cylinder compression pressure check and service
(8). Spark plug corroded , damaged or
Spark plug gap abnormal replace spark plug
(9). Intake manifold or connecting hose vacuum leaking check or service
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