Hobart Welding Products OM-945 manual Cold Weather Engine Operation, Infrequently, Loaded

6-2. Cold Weather Engine Operation

1	Infrequently
	Loaded

Frequently

Loaded

Ref. 226 427-A

1Engine 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 rela- tive humidity is high. Ice forms on the throttle plate and inner bore of the carbu- retor. The engine typically restarts without problems but soon stalls again.

STreat gasoline with a fuel de−icer product (isopropyl alcohol).

SPlace the Engine Control switch in the Run position.

SRun engine only when expecting to frequently load it.

Breather Icing

Oil breather/pulse line icing occurs in severe cold (continuously below 0_F). Moisture accumulates in the oil from piston 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 operating problems. Due to ice in the lines, the engine may not restart until it is warmed to above freezing.

SLoad engine and reduce idle times to prevent engine shutdowns.

SUse an electric fuel pump to avoid pulse line freezing.

SInstall engine cold−weather kit.

Both Kohler (1-800-544-2444) and Robin (1-800-277-6246) offer kits for cold weather operation. The user can install these kits. Both kits pull heated air from the muffler surface into the carburetor and shut the cold air off. This increases engine temperature during operation in both idle and high speed.

.When the ambient temperatures become warmer (above 45_F) the air flow will have to be returned to normal.

6-3. Amperage Selection Table For Stick (SMAW) Electrodes

. Use table on front panel to se- lect correct amperage for the electrode being used.

Ref. 202 069-A

OM-945 Page 19