Check that Battery
When it’s cold outside, everything is a little more sluggish – the fuel and engine oil is cold and thick. To ensure it starts first time the battery must be in good condition. It needs to hold a good charge in order to provide adequate cranking amps – a diesel generator requires upwards of 1,000 cold cranking amps to get its engine running. A quality battery provides the sustained cranking power and duration needed to get the engine running in cold weather.
Note: Check the label on the battery to see how old it is. Those pop-out dots should indicate the month and year it was installed. The label should indicate the life expectancy; they usually range from 48-72 months but if you suspect your battery is getting near the end of its life cycle, it may be a good idea to replace it before cold weather strikes.