LAUSON ENGINES AND TRACTORS
(Page 4 of 12)
The 2.5-12 HP models were available as Frost King hopper cooled
engines, while plain cylinder versions were furnished in the 6-20
HP models. The 6-20 HP models employed separate castings for the
cylinder and engine frame (and sub-base, when used) but the 2.5, 4
and 5 HP models used a one-piece cylinder/frame/case casting.
Valve location: Both valves in the cylinder head.
Atmospheric-operation intake valve, pushrod operated exhaust
Ignition: Battery and coil for all models. 2.5-5 HP were
equipped with jump spark (spark plug). A make-and-break ignitor was
standard on the 6-20 HP models. A friction drive 'auto
sparker' was available.
Camshaft: One of the 'hallmark' Lauson features is that
the camshaft on the ignitor-equipped models was constructed with
separate cams for the exhaust valve pushrod and the ignitor
pushrod. The camshaft runs in an enclosed housing that is partially
filled with oil.
Governor: Hit and miss; governor weights located at the magneto
side flywheel hub. The 2.5-5 HP models used a single weight.
Fuel: Gas, Gasoline, Distillate, Benzene.
Crankshafts: Machined from a one piece steel billet forging.
Connecting Rods: Turned from a steel forging, with adjustable
'boxes' at each end.
Pulley: Solid pulley was standard, clutch pulley was optional.
The actuator on the clutch pulley was a single push-pull lever.
All models were available either as semi-portable (skid
mounted), portable (on factory-equipped trucks) or stationary. The
plain cylinder models were furnished with a screen cooler and water
Portable saw rigs were available in sizes of 6, 8, 10 and 12 HP.
Sleigh runners could be ordered for any of the portable models.
Catalog 13 also shows a vertical cylinder engine, built in sizes
of 2, 2.5 and 4 HP. I do not believe that this engine was actually
manufactured by the John Lauson Manufacturing Company. This engine
appears to be identical to a vertical engine that was sold by the
C. P &.
J. Lauson Company of Milwaukee, Wisconsin; in fact, either
engine bears a strong resemblance to a Bates and Edmonds vertical
During the early part of this century, several engine building
companies having 'Lauson' in their names evolved but there
is no known connection between any of these and the John Lauson
Catalog 14 dates from approximately 1910/1911. This catalog
describes the following models:
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