This is the gasoline powered Fuji Imvac 2.1 cu inch (34cc) / EIS 4-Stroke Engine. / / FEATURES: New Four-Stroke Design for more reliability and starting ease / CNC machined parts / Head up mounting only. (no side or inverted mounting) / EIS (Electronic Ignition System) / Parts are lubricated by a constant flow of ultra-low-viscosity Fuji / 0W20 100% synthetic oil from a pan on the bottom of the engine / Walbro butterfly-type carburetor, fine tuning the Idle, Low, and High / Speed screws can be accomplished in a few seconds with only a / slotted screwdriver (FJIG3290) / Ball bearing-supported crankshaft / True chrome-plated cylinder / Direct R/C specific throttle linkage setup / Custom firewall mounting system / Can be identified by the BF-34EI nameplate on the Rotor / No break-in required / 3-YEAR limited warranty for US and Canada / / INCLUDES: One Fuji Imvac 2.1 cu in (34cc) 4-stroke engine with Champion RCJ6Y / or NGK CMR6A Spark plug FJIG7475, muffler FJIG6095, mounting / hardware, 30mm prop flange, M13x16 box spanner FJIG3730, 4mm hex / wrench, 100cc fuel bottle, and instruction manual / / REQUIRES: Regular unleaded gasoline, propeller, engine ON/OFF switch / EIS battery FJIP9925 / / SPECS: Height: Oil Pan to Rocker Cover 8" (203mm) / Width: 6¾" (171mm) / Weight: 4.9lbs (2.0kg) / Distance from firewall to prop rotor: 6" (152mm) / Muffler exhaust outlet diameter: 9mm inner, 11mm outer / Distance across mounting screws on motor mount: 95mm / Distance top and bottom mounting screws: 75mm / Displacement: 2.1 cu in (34cc) / Bore/Stroke: 39x28mm / Spinner Bolt: 3/8-16 threaded 13mm hex / Practical RPM: 1000-7500 / Brake Horsepower: 2hp @ 7500 RPM / Peak Torque: .20kgm @ 5,000 RPM / Default carb settings: High Speed 1¾ to 2 turns OUT / Low Speed 1-1/3 turns OUT / Recommended Propeller: 22x6-10 (TOPQ5241)