Have you ever went out to shovel or snow blow your driveway and not be able to start your snow blower? Most likely your snow blower would not start because the motor was to cold. Put a portable heater by the crank case and warm up the oil and it should start. That takes about an hour depending on how cold it is.It works the same as a block heater in a car. If you do not have a portable heater use a hair dryer.