Pretty good engine after cleaning a mess of silicone between the carburetor and engine, quality control was not that good, I'm still working on the carburetor settings but so far it runs very good.
Propeller used 14" x 7" pusher 3 blade propeller.
Spec.
Displacement: 30cc
Weight: 939g (w/ spark plug)
Carburettor: (Walbro) Diaphragm & Butterfly valve.
Prop Speed: 1600 ~ 12000rpm
Max power: 2.7hp/1.98kw
Suggested prop: 16x8, 17x8, 17x10
Ignition: DC-CD (6v only)
Mixture: 25:1 to 40:1
Bore/Stroke: 34x28mm
Size: 130mm high / 120mm wide*
Mount hole: 64mm x 64mm
[youtube]http://www.youtube.com/watch?v=edAm_nAiiv4[/youtube]