BlueBird BB550A_968999494 - Manual (Page 21)

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21
Symptom Cause Action
Engine is under-powered
or runs unevenly
Air filter Clogged air filter Clean or replace the air filter
fuel system
machine stored without observing
proper procedure from chapter
Storage
Clean tank, sludge reservoir and empty
carburetor. fill the tank with fresh fuel.
Blue or voluminous
blue-white exhaust
Contaminated or incorrect fuel
Clean tank, sludge reservoir and empty
carburetor. fill the tank with proper fuel.
Black exhaust Choke left on open choke valve
Clogged air filter Clean or replace the air filter
Carburetor problems Contact authorized service workshop.
Ignition system Wrong spark plug type replace the spark plug
Build-up on electrodes, short circuit
Check electrode gap and clean or
replace spark plug.
faulty ignition unit Contact authorized service workshop.
low compression
Serious interior engine damage or
faulty valves
Contact authorized service workshop.