How to convert a petrol generator using an aftermarket Dual Fuel LPG/NG Conversion Carburetor bought off eBay.
Generator type is a Fireman SPG2500 generator 5.5hp or engine types 168F, Honda GX160, Fireman SFE160.

The conversion kit allows you to use liquefied petroleum gas (LPG) or natural gas (NG) while still keeping petrol/gasoline as a fuel.

The benefit of this type of conversion is LPG gas doesn't go bad over time and foul up your carb. Whereas petrol/gasoline does go off and only has a shelflife of six months.