Fuel tank empty (faulty indication of fuel
gauge).
Refuel, replace fuel gauge.
Fuel valve closed or filter locked.
Open fuel valve, clean or replace filter.
Fuel line defective or not connected.
Replace or connect fuel line.
Repair or replace fuel pump.
Induction system leakage.
Check induction system for leakage and
replace, if necessary, tighten joints.
Carburetor contaminated or locked.
Choke not operated to its stop (cold engine).
Operate choke and check as necessary.
12.2 Engine Operating Trouble
The following phenomena are considered to be engine operating trouble:
• uneven and irregular engine run
• temporary interruptions
• low power
• engine overheat
• rough engine run
Consider reasons as per section 12.1 besides the ones listed below.
12.2.1 Fuel Supply
Insufficient fuel flow (Fuel ventilation lokked,
lines blocked or defective, filter or
screens blocked).
Check tank ventilation, lines, filter and
screens and replace as necessary.
Insufficient fuel pump pressure.
Check fuel pump pressure and correct, if
necessary.
Repair or replace fuel pump.
Float valve contaminated, jammed or
Clean or replace float valve.
Wrong carburetor float level.
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