Troubleshooting For Slow Run - TGB BR8 Service Manual

1-8-4 Troubleshooting for slow run (troubled engine)
Check for contamination in spark plugs and excessive gap
Alarming abnormality of ignition timing
Poor
adjustment
Replacement of
the filter grill
Poor slow run
Fair
Fair
Is the air filter grill
obstructed?
Fair
Poor
Is the carburetor buoyant
level normal ?
Check if the choke
valve fails (valve
does not open) ?
Poor
Check of for air between the
Correction
carburetor and the air inlet
Add tightening force or
replacement of the washer
Analysis of potential causes
Poor
Cleaning and
adjustment
Poor
Fair
Adjustment or
replacement of the
buoyant needle valve
Fair
Poor
Fair
Check for obstruction in the
carburetor slow injection
Poor
Cleaning
Check for air leakage in the cylinder washer,
24
Dirty spark plugs
Incorrect spark plug
gaps
Incorrect ignition
timing
Obstructed air filter
grill
Poor carburetor
buoyant needle valve
Poor carburetor choke
valve
Poor engagement of
carburetor and inlet
tube
Obstructed carburetor
slow injection
Poor engagement of
cylinder head washer
Severe wear of
cylinder, piston, piston
ring
Fair
Test the compression
check wear of cylinder, piston, piston ring
and other elements with correction,
adjustment or replacement