The Oil Cooled "Frost-Proof" was the first
engine to be manufactured and sold by Fuller & Johnson. It was
designed by Frank D. Winkley who at the time worked for Gisholt Machine
Tool which was founded by John A. Johnson. A small number of these
engines were built at Gisholt and sold under the name Madison Gas
Engine. 1902 was the first year the line was introduced in 1 1/2,
3 and 6hp sizes. By the end of 1903 the two smaller sizes were
re-rated to 2 and 3 1/2hp while the 6hp remained the same. These
engines were heavily built featuring large split hub flywheels, an
enclosed crankcase and hit miss governing with the weights being located
in the large cam gear. A fuel pump fed an overflow mixer and
initially dual ignition was provided by a hot tube and electric ignitor
with the former being dropped on later engines. The two larger
sizes also had mechanically operated intake and exhaust valves using a
clever pull/pushrod system operated by a single cam.
Adding to the engine's substantial weight was the unique oil
cooling system. A cast iron steam radiator was fitted to an
extension of the sub base and piped to the engine's cooling jacket.
An expansion tank was provided and some engines were also fitted with a
circulation pump. The entire system was filled with a light
mineral oil making for a truly frost proof cooling system. This
however made not only for a heavy engine but an expensive one. A
more traditional and cheaper water tank cooled version was offered and
the 6hp size was even offered as a hopper cooled engine. This odd
variation briefly became the 6hp Double Efficiency.
A 3hp Oil Cooled stationary engine.
A factory built pumping unit powered by a 1 1/2hp engine. Note the
dual ignition systems.
The mighty 6hp Oil Cooled featured dual cooling radiators and an oil
Mounted on a high set of team trucks this 6hp portable is an impressive
looking piece of machinery.
A hopper cooled 6hp engine on a factory built combined sawing and grinding
This double gear reduction pumping unit was intended for heavy duty pumping