We recommend a Generator or Waterblaster to be started up regularly, used for a good period of time and on a regular basis to minimise the potential of hard starting hassles of infrequent use.
A good idea is to ensure your Generator has a fuel stabilizing agent added to the fuel tank to improve the fuel shelf-life and reduce the hard "start-up" related to stale fuel. Stale fuel can be a real inconvenience when needing to start your generator, especially in an emergency situation when it is urgently needed, so regular starting to "turn fuel over" can help.