oil becomes thick and flows slowly. Below 25F (-4C) ice crystals form on fuel, fog oil, or air pressure
hoses. These ice crystals gather in strainers, elbows, and valves and stop flow of fuel, fog oil, or air.
Disassembling and clearing clogged lines, elbows, and valves takes time. Below 0F (-18C) starting
Very little can be done when operating the generator in extreme heat except to keep the fuel tank
filled to capacity and the fuel cap tight to prevent evaporation. However, when operating in extreme
cold, several procedures must be used to ensure operation.
Servicing in Unusual Weather
To service the generator in unusual weather, perform the following steps:
Step 1. Clean mud, snow, and ice from the smoke generator before, during, and after use.
Step 3. Keep gas and kerosene caps securely tightened on cans when not in use.
Step 4. Keep fuel tank cap securely tightened on fuel tank except when fueling.
Step 5. Fill fuel tank as often as possible.
Step 6. Keep bungs securely tightened on fog oil drums when not in use.
Step 7. Check for ice crystals in fuel or fog oil.
Cold Weather Fog Oil Mixtures
For operation in freezing weather, fog oil and kerosene can be blended to form mixtures that flow
easier. Table 1 lists percentages of fog oil-fuel mixtures recommended for operation in freezing
weather. Notify fuel supply personnel if your generator requires these mixtures. Fuel supply personnel
are responsible for mixing and supplying these mixtures.
Know your smoke generator. Some can operate at low temperatures with fog oil
Table 1. Fog oil-fuel mixtures.