The specifications for the X100, X200 and X300 series of engines are as follows.
             Type - 4 cycle single cylinder set at 30-degree angle.
             Power - 5/8 H.P.
             Bore - 2 1/8 inches.
             Stroke - 1¾ inches.
             Speed - 1750 to 1800 rpm.
             Ignition - High tension built in flywheel magneto.
             Spark Plug - 18 mm Champion #7.
             Carburetor - Vacuum fuel lift.
             Crankcase - Crankcase breather vacuum seal.
             Governor - Mechanical fly ball type to control speed of engine.
             Crankshaft - Precision balanced chrome nickel.
             Valves - Cast iron head electrically fused to carbon steel stem.
             Connecting Rod - Aluminum alloy.
             Piston - Aluminum alloy.
             Finish - Baked black lacquer wrinkle finish.
             Weight - 34 pounds.

The specification for the X400 and X500 series are as follows.
             Type -
                          4 cycle single cylinder set at 30-degree angle.
             Power -
                          X400 series suction carburetor 5/8 hp. 1800 r.p.m.
                          X400 series down draft carburetor ¾ hp. 1900 r.p.m.
                          X500 series down draft carburetor 1 hp. 2000 r.p.m

 

Canadian Engines
                          X400 series suction carburetor 5/8 hp. 1725 r.p.m.
                          X500 series suction carburetor 1 hp.
                          X500 series down draft carburetor 1.34 hp. 2400 r.p.m.

( Specification differences existed between US & Canadian engines. )

             Bore, Stroke -
                          X400 series 2 1/8 X 1 ¾
                          X500 series 2 ¼ X 1 ¾
             Starting -
                          Optional, foot pedal, hand lever, rope, & recoil (only in Canada)
             Ignition -
                          Johnson built flywheel magneto, enclosed, moisture proof, high-tension type.
             Spark Plug -
                          14 mm Champion J-8.
             Carburetors -
                          Adjustable, efficient suction feed built by Johnson.
                          Down draft float-feed with high and low speed jets and adjustment.
             Cooling -
                          Radial fan blades on flywheel force strong air current over cylinder and head
                          directed by shroud.
             Crankcase -
                          Cast separately. Improved check valve breather. Oil capacity ¾ pint.
             Governor -
                          Mechanical fly ball type mounted on crankshaft inside crankcase.
                          Close speed control. Speed adjustment.
             Cylinder -
                          Nickel iron. Separate from crankcase. Ground and honed to mirror finish,
                          closed dimensions.
                         Valve guide inserts.
             Bearings -
                          Main journals, steel backed Babbitt. Protected by oil and dust seals.
             Crankshaft -
                          Drop forged steel, ground to smooth close limits.
             Valves -
                          Exhaust valve silchrome, intake valve nickel steel.
             Connecting rods -
                          Pressure die-cast aluminum alloy.
             Piston -
                          Pressure die-cast aluminum alloy. Anodic treated for hardness and long life.
                         Two compression rings, one oil control ring.
             Lubrication -
                          Exclusive Johnson design metered splash to all internal parts.
             Finish -
                          Sprayed black enamel.
             Weight -
                          Depending on model and equipment from 37 to 42 pounds.
             Gasoline tank -
                          Regular with suction feed carburetor one quart, overhead for gravity feed 3
                          quarts, base tank available one gallon.
             Air Cleaner -
                          Approved oil bath type regular on down draft carburetor.
                          Special dry type for suction feed carburetor.
             Pulleys -
                          V-belt type (several sizes) both ends of crankshaft.

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Last modified:  08 / 03 / 2005