Webra 55GT

Capacity - 0.55 cu in
Power - 2.0 Hp
RPM max - 17,000
Bore - 0.93 inch
Stroke - 0.81 inch
Weight - 12.7oz (dunno if that is with or without muffler).
Crankshaft - 0.37 in (3/8" ) dia with 1/4"x28 thread.
Prop 11x7/12x6

Overall height (ex. plug) - 3.3"
Prop driver to back of motor - 3.46"
Distance between engine bearers - 1.34"
Distance between mounting holes (fore/aft) - 0.7"
Distance between mounting holes (port/stbd) - 1.7"