Is this it?
http://www.shindaiwa.com/products/blowers/eb8510.html



EB8510 and EB8510RT
Dry weight *
24.5 lbs (11.1kg)
Displacement
4.86 cu.in (79.7cc)
Output
4.5 hp (3.3kW) @ 8000 rpm
Nozzle velocity
224 mph (with optional 65mm nozzle)
Fuel tank capacity
67.6 oz (2.0 liters)
Noise rating
75 dB(A) / 65 dB(A) in hush mode
Maximum blower air volume
762 CFM (with tubes)
Maximum blower air volume (w/o tubes)
952 CFM (w/o tubes)


$560 from a local lawnmower shop! Do they sell just the engine?

Joe