Abstract: The present disclosure is directed to a biomass gas producer having a tiltable gassifier in which the gassifier for performing endothermic chemical reactions of solid material having combustible gas forming and liquifiable constituants has a top charging end and an ash discharge end. A platform support means is provided for the gassifier. An adjustable support means is carried by the platform for supporting the gassifier for tilting from a substantially vertical endothermic reaction or firing mode to a low height inclined charging mode for introducing the material to be fired. A tilt means is connected to the adjustable support means to incrementally tilt the major axis of the gassifier between a firing mode position and a loading and waste discharge mode position. The gassifier also has means for directing the burnable gas produced therein to operate a prime mover for example a boiler, internal combustion equipment or turbine to drive power take off shafts to perform useful mechanical tasks.