Cold Weather Engine Operation - Miller Wildcat 200 Owner's Manual

6-4. Cold Weather Engine Operation

1
OM-237 711 Page 28
Infrequently
Loaded
Frequently
Loaded
.
A complete Parts List is available at www.MillerWelds.com
1 Engine Control Switch
Carburetor Icing
Carburetor icing causes the unit to drop
below the normal idle speed and then
stall. This condition occurs when the
temperature is near freezing and the rel-
ative humidity is high. Ice forms on the
throttle plate and inner bore of the carbu-
retor. The engine typically restarts with-
out problems but soon stalls again.
S Treat gasoline with a fuel de−icer
product (isopropyl alcohol).
S Place the Engine Control switch in
the Run position.
S Run engine only when expecting to
frequently load it.
Breather Icing
Oil breather/pulse line icing occurs in se-
vere cold (continuously below 0_F).
Moisture accumulates in the oil from pis-
ton ring blow−by if the engine is exten-
sively idled. This may cause vacuum line
freezing, oil breather tube freezing or ice
in the carburetor. All of these cause oper-
ating problems. Due to ice in the lines,
the engine may not restart until it is
warmed to above freezing.
S Load engine and reduce idle times to
prevent engine shutdowns.
Use an electric fuel pump to avoid
S
pulse line freezing.
237 335