OS Engines 38200 GT22 Engine with Muffler Rear Carburetor FEATURES: Beam mounting design allows engine to fit inside cowls that are sized for 2-stroke .60-.91 and 4-stroke 1.20 glow engines INCLUDES: GT22 Engine with Muffler, Electronic Ignition Module, CM-6 Spark Plug Muffler Gasket, Muffler Bolts and Instruction Manual REQUIRES: 2-cycle oil with a mix ratio of 50:1 if using Klotz model oil (if using other brand, follow manufacturer's mix ratio