Great Power GP-76 Gas Engine The tightest tolerance with every component, GP-61 is a real monster. Every piston and cylinder are tolerance checked and matched, this ensures that the clearances are correct, and the power is maximum. Customized GP ignition not only produces smooth transition but is also easy to start. Comparing with other brands, GP-61 offers much more power and at a more reasonable price. The made-for-flight design ensure the best power-to-weight ratio for maximum flight performance. GP61 weighs less than 1500 grams and cranks out more than 6.5 horsepower from a durable and long-lasting engine. The power-to-price ratio is impressive! Please note: a muffler is included with the GP-61. ---> Displacement: 76cc Bore: 38 mm RPM Range: 1400-8000 Output: 8 Horsepower Weight: Engine: 1650g/ Ignition: 202g/ Muffler: 200g Gasoline: 89-92 Unleaded Gasoline/Oil Mix Ratio: 40:1 Carburetor: Walbro HDA-246 Spark Plug: NGK CM-6Mufflers included 2-Blades 24x9 24x10 25x8 ---> INCLUDES ENGINE, IGNITION, MUFFLERS/GASKETS