The Kolm EZ-77 is the logical development of the EZ-65. The steel sleeve has been taken out, Nickel-Silicon plating on the original aluminum cylinder enlarged the bore and has resulted in an increased capacity and, of course, more power with less weight.The Kolm EZ-77 is very suitable for Warbirds as well as other Scale and aerobatic models. The EZ-77V3 is available with a brushless electric starter, making it a good choice for big powered gliders.The brushless engine starter is so realistic, just like the full-size Warbirds, with a very slow turning speed, slowly accelerating, and then firing.The EZ-77V3 can be supplied as turning clockwise or anti-clockwise. · Nickel-Silicon plated cylinder surfaces, far lighter than steel cylinder liners guarantee high wear resistance· Assembled heat-treated steel crankshaft with Tungsten balance weight inserts· Conrod CNC milled from high strength steel, and have a spindled bore surface for the big end needle roller bearing· Plain bronze small end bearing· Double camshaft acting on overhead valves by pushrods· A light weight, low inertia valve train allows relatively high RPM· Crankcase CNC milled from high-strength aerospace alloy· Excellent Müller-Microprocessor-Ignition developed by Günter Müller in Germany, now made in Austria by Kolm Engines· Valves and pistons are manufactured at Kolm Engines in Austria on modern CNC machines· Walbro carburetor WT-225· Engine length adjustable by longer and shorter optional prop hubs· Rapid spares delivery and repair service from Germany by Toni Clark practical scale GmbH. · Each and every Kolm engine is tested in the factory and run for thirty minutes. Of this test a detailed proof certificate is supplied. Specifications: Displacement: 77 cc Bore: 47 mm Stroke: 44 mm Weight incl. prop bolts: 3,248 g Weight with ignition: 3,388 g Weight with starter motor: 3,801 g Weight with ignition and starter motor: 3,941 g RPM range: 850 - 7,000 1/min Fuel: 1:50 Engine lubrication is by means of the well-tried two stroke mix with a 1:50 oil to petrol ratio. You may use Normal 95 octane, Super grade 98 octane or Aspen. In Germany we recommend “Aral Ultimate 102”, as this does not contain Ethanol. Performance data: 2-blade prop: n min [1/min] n max [1/min] Mejzlik 24x10 1.000 6.300 Mejzlik 26x8 1.000 5.700 Mejzlik 27x10TH 8500 5.200 Engel 27x12 850 5.350 3-blade prop: n min [1/min] n max [1/min] Mejzlik 22x10 1.000 6.000 Mejzlik 24x10 1.000 5.300 SEP 21x10 1.400 5.600 Fiala 23x14 1.300 5.100 4-blade prop: n min [1/min] n max [1/min] Super Silence CFK 27x12 700 3700
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