A gas powered internal combustion engine arrangement comprising, in combination: liquified gas storage bottle arrangement having a preselected amount of liquified gas stored therein and having an outlet connection thereon to allow the flow of gas generated from said liquified gas therethrough to regions external said liquified gas storage bottle arrangement; an outlet conduit connected to said outlet connection of said liquified gas storage bottle arrangement to allow the flow of gas therethrough; a pressure regulator connected to said outlet conduit for regulating the pressure of the gas flow therethrough and having a regulated pressure gas flow outlet to allow the flow of pressure regulated gas to regions external of said pressure regulator; an internal combustion engine having a carburetor connected to said regulated pressure gas flow outlet of said pressure regulator for mixing said pressure regulated gas with air to provide an ignitable gas-air mixture, at least one cylinder and piston for receiving said ignitable gas-air mixture, a spark plug for igniting said ignitable gas-air mixture, an output shaft having a first end rotatably connected to said piston for rotation about a preselected axis and an output end, a crank case for containing said piston and cylinder, said output shaft and said output end of said output shaft extending through said crank case to regions external of said crank case, and said crank case heated and vibrated by operation of said internal combustion engine; characterised in that said gas powered internal combustion engine arrangement further comprises a mounting bracket rigidly connected to said internal combustion engine for receiving conductive heat and vibration from said internal combustion engine, said mounting bracket having a strap; said mounting bracket having an arcuate surface and said arcuate surface of said mounting bracket having a curvature matching the curvature of said gas storage bottle and extending axially therealong for a substantial portion of the axial extent of said circumference of said gas storage bottle and said strap clamping said gas storage bottle against said arcuate surface of said mounting bracket, the mounting bracket and strap defining a cavity in which the liquified gas storage bottle arrangement is received; said liquified gas storage bottle arrangement rigidly mounted on said mounting bracket for conductive heat transfer thereto from said internal combustion engine for heating said liquified gas stored in said liquified gas storage bottle arrangement and vibrated by said internal combustion engine for agitating said liquified gas stored in said liquified gas storage bottle arrangement to increase the surface area thereof. liquified gas storage bottle arrangement having a preselected amount of liquified gas stored therein and having an outlet connection thereon to allow the flow of gas generated from said liquified gas therethrough to regions external said liquified gas storage bottle arrangement; an outlet conduit connected to said outlet connection of said liquified gas storage bottle arrangement to allow the flow of gas therethrough; a pressure regulator connected to said outlet conduit for regulating the pressure of the gas flow therethrough and having a regulated pressure gas flow outlet to allow the flow of pressure regulated gas to regions external of said pressure regulator; an internal combustion engine having a carburetor connected to said regulated pressure gas flow outlet of said pressure regulator for mixing said pressure regulated gas with air to provide an ignitable gas-air mixture, at least one cylinder and piston for receiving said ignitable gas-air mixture, a spark plug for igniting said ignitable gas-air mixture, an output shaft having a first end rotatably connected to said piston for rotation about a preselected axis and an output end, a crank case for containing said piston and cylinder, said output shaft and said output end of said output shaft extending through said crank case to regions external of said crank case, and said crank case heated and vibrated by operation of said internal combustion engine; characterised in that said gas powered internal combustion engine arrangement further comprises a mounting bracket rigidly connected to said internal combustion engine for receiving conductive heat and vibration from said internal combustion engine, said mounting bracket having a strap; said mounting bracket having an arcuate surface and said arcuate surface of said mounting bracket having a curvature matching the curvature of said gas storage bottle and extending axially therealong for a substantial portion of the axial extent of said circumference of said gas storage bottle and said strap clamping said gas storage bottle against said arcuate surface of said mounting bracket, the mounting bracket and strap defining a cavity in which the liquified gas storage bottle arrangement is received; said liquified gas storage bottle arrangement rigidly mounted on said mounting bracket for conductive heat transfer thereto from said internal combustion engine for heating said liquified gas stored in said liquified gas storage bottle arrangement and vibrated by said internal combustion engine for agitating said liquified gas stored in said liquified gas storage bottle arrangement to increase the surface area thereof.