Glow Engine Operators - if you prefer a venturi (Needle Valve Assy) carburetor set-up ... then see BRODAK, JUST ENGINES or MECOA for their line-ups of venturis (NVA's) or search for other web-based sources for such parts. You will need to know the engine case carburetor mount bore (usually in mm) and some NVA mounting information for your specific application. My experience has been that most RC carburetor glow engines will respond very well to such conversion treatment.