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10 hp Briggs & Stratton, Model No. 243431, 4 cycle. Heavy-duty air-cooled, with mechanical governor. Stellite exhaust valves with Stellite seat for longer life, plus special flywheel rotating screen which spins leaves and clippings out of cooling air.
All gear transmission. 3 speeds forward and one reverse.
Three forward speeds vary from 1.6 mph to 6.1 mph; reverse speeds up to 3.1 mph.
Easy-Spin electric starter, 12-volt system with 40 amp battery, key ignition switch, 3-stage voltage regulator.
Combination clutch-brake for positive control. Depressing clutch halfway
declutches unit, depressing all the way down applies brake.
Controlled Traction Differential--when one wheel is on slippery surface, other rear wheel continues to drive.
31½ inches on inside wheel.
Steering ratio 4.1 to 1 gear reduction.
Without attachments--34½ inches wide x 68 inches long x 37½ inches high.
Standard 8½ inch wide rear tires, 8.50 x 12 suburbanite tread 2-ply; front tires 4.80 x 8 studded tread 2-ply.
Deluxe foam rubber bucket seat.
[Source: Simplicity -- for picture perfect outdoor maintenance,
1969 Product Catalog, Form No. 868, courtesy of John Boesch]