4.241
What does the spark plug´s face tell us ?
If the right sparkplug´s inner parts (the „face“) are black (meaning oily or grimy) one of the following
problems could be responsible:
a)
Distance of spark plug´s electrodes is too small
b)
carburetor ratio is too thick
c)
Mechanical defects of the carburetor that lead to an over enriched ratio like a worn
out floater needle or a defective floater.
d)
Dirty air filter
e)
Too much oil or the wrong kind of oil in the fuel mix
f)
Wrong ignition timing
g)
Mechanical defects in the Ignition (dirty or stuck breaker lever, wrong points
adjustment or condenser or ignition coil defective).
h)
Significant build up of fuel residue within the engine compartment (burned in piston
rings or dirty ports and exhaust).
i)
Vehicle is being operated too slow
If the right sparkplug´s face is light colored (white-grey) and the electrodes show signs of little pearl
like objects, the sparkplug was overheating. The following problems might be responsible:
a)
Electrode distance too big.
b)
carburetor ratio is too lean.
c)
Mechanical defects of the carburetor that result in a ratio, that is too lean like fuel
level in the floater chamber is too low, carburetor is slant or loose or the carburetor´s
mixing chamber tightning nut is loose.
d)
Obstructed fuel supply (Fuel filter dirty, fuel line clogged or dirty carburetor).
e)
Defective engine gasket.
f)
Missing air filter.
g)
Not enough oil or oil of poor quality in the fuel mix.
h)
Wrong ignition timing.
i)
Sparkplug old or missing sparkplug gasket.
Содержание BERLIN SR59
Страница 1: ...Operating Manual for STADTROLLER BERLIN SR59 Edition 1960 VEB INDUSTRIEWERKE LUDWIGSFELDE ...
Страница 15: ...Image 4 Power curve chart ...
Страница 31: ...Illustration 25 Explosion diagram of carburetor ...
Страница 67: ......
