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INTRODUCTION
The FRADAN Back-Pack Blower model BB-70 is a ruggedly built, high performance gasoline powered unit
designed for blowing leaves and other lawn debris. Proper maintenance and use of the FRADAN Back-Pack
Blower will guarantee years of safe, service-free, reliable operation. We urge you to follow these instructions to
assure safe and reliable operation.
TECHNICAL DATA
MODEL
...................................................................BB-70
Engine Type
...........................................................Air cooled, two-stroke, single cylinder gasoline engine
Displacement
.........................................................63.3 cc (3.86 cu. in.)
Bore
........................................................................48.0 mm (1.89 in.)
Stroke
.....................................................................35.0 mm (1.38 in.)
Carburetor
..............................................................Walbro Diaphragm, model WYK w/ primer bulb
Ignition System
......................................................Flywheel Magneto
Spark Plug
..............................................................NGK BPM-8Y Gap 0.65 mm (0.026 in.)
Exhaust System
.....................................................Spark Arrestor Muffler
Fuel
.........................................................................Mixed (Gasoline and Two-stroke Oil)
Fuel/Oil Ratio
.........................................................40:1 High Performance, two-stroke air cooled engine oil
Gasoline
.................................................................89 Octane unleaded. DO NOT use fuel containing methyl alcohol,
more than 10% ethyl alochol or 15% MTBE.
Fuel Tank Capacity
................................................1.68 Liters (57 liq. oz.)
Recoil Starter System
...........................................Automatic Recoil Starter
Idle Speed
..............................................................2350-2850 (RPM)
Wide Open Throttle Speed
...................................6800-7300 (RPM)
Maximum Air Speed
(measured at pipe end)
............338 KM/H (210 mph)
Average Air Volume
(measured at pipe end)
............18.1 cu. m/min. (640 cu. ft./min.)
Maximum Air Volume
(measured at housing)
...........34.0 cu. m/min. (1200 cu. ft./min.)
Length
....................................................................375 mm (14.76 in.)
Width
.......................................................................485 mm (19.1 in.)
Height
.....................................................................527 mm (20.75 in.)
Weight
.....................................................................10.4 kg. (23.0 lb.)
Technical Data subject to change without notice.
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