each backpack style petrol-powered cold misting fogger contains liquid tank, oil tank, engine, ignition starter and nozzle. The normal overall empty weight is approx. 35lbs with a 4 gal liquid tank. As the petrol-powered fogger has to carry 1.1 qt oil tank and it adds at least 1 kg. The fuel consumption is 1L/h and at cost $0.42 per hour.
it’s not that easy to start a petrol power mist duster, yanking the starter with proper speed and force to ignite the mixture of air and fuel. it needs practices and so you prefer keep the engine on until work is done. However, petrol powered fogger is cordless and suitable for large scale work area without a limited spraying range.
As to function aspects, petrol powered fogger usually has a 2hp power(1.5kw) and spray at least 15 feet far away with a maximum output 17L/h. with a normal mist duster nozzle, it can produce 50-100 micron droplets. and it’s more common use at outdoors per it causes emission.
If a petrol-powered fogger can’t work well or breaks down, it would need a professional to repair.