Kerosene cannot be used in a gasoline engine without major modifications. The difference in combustion properties between the two fuels is significant. Kerosene is more similar to diesel than gasoline.
In order for a liquid petroleum-based fuel to be used efficiently, it needs to be in vapor form. Gasoline can be vaporized at around -40 degrees Fahrenheit. Kerosene is much closer to an oil and requires a much higher temperature for effective vaporization ? around 130 degrees Fahrenheit. This is why kerosene and diesel are often interchangeable in small engines and heaters.
Fuel oils like kerosene are ignited when they are under extreme pressure. Gasoline engines are not capable of generating the cylinder pressures necessary to ignite kerosene.