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 B 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.