25
1-8-5 Poor acceleration and horse power
a
Poor acceleration and horse power
Breakdown of potential causes
Check for drag of braking drum by braking plate
Fair
Poor
Check for obstructed air filter
Adjust or replace
braking plate
z Braking plate retaining braking
drum
z Air filter grill obstructed
z Dirty spark plugs
z Incorrect gap in spark plugs
z Incorrect ignition timing
z Poor skip in spark plugs
z Incorrect adjustment of
carburetor adjustment screw
z Poor choke valve in carburetor
z Dirty or obstructed carburetor
injection nozzle
z Poor carburetor buoyant needle
valve
z Dirty fuel filter
z Obstructed fuel circuitry
z Poor engagement of cylinder
washer
z Serious damage of cylinder,
piston, piston ring
Cleaning,
adjustment of
replacement of
new spark plugs
Check for
normal ignition
timing
Check for burn of spark
plugs and the gap
Replacement of the
filter grill
Intense
sparks
Poor skip
Check for normal
choke valve action
Adjustment
Check carburetor for
proper adjustment
Fair
Poor
Fair
Poor
Test of spark plugs,
sparks
Timing
Fair
Poor
See 1-8-2 poor
skip of spark
plug for
checking
methods
Fair
Poor
Check for
obstructed
injection nozzle
Correction or
replacement
Fair
Poor
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