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This is a Model F Briggs & Stratton "Full Power" engine. This engine was the first model that Briggs built that was expressly designed as a stationary engine. They had previously built the Motor Wheel which was used to power bicycles, buckboards, and scooters. This engine is serial No. 251 and was built in November of 1921.
The Doodle Bug Motor Scooter was built by the Beam Mfg. Co. in Webster City, Iowa between 1946 and 1948. The scooter is powered by a Briggs & Stratton Model NP engine with a special kick starter assembly. While these scooters are underpowered by today's standards, they were the dream of many boys during their heyday. Now they are the dream of us collectors.
This is a Model NPW water cooled Briggs and Stratton engine. From what I have been able to find out, these engines were assembled by Briggs & Stratton using castings that were supplied by United States Motors Corp. All internal parts of these engines are standard Model N Briggs parts. These engines were never marketed directly by Briggs & Stratton and were used for marine propulsion and marine generator sets. These engines were built right after WWII.
The Model A Briggs & Stratton was introduced in 1933 and continued to be manufactured with few changes until 1948. The engine was very heavily built and designed to take a lot of punishment. It was rated at 1 HP and was mechanically governed. This engine is an early version, built in 1936, with a different carburetor than that used on later engines.
the Model U Briggs & Stratton engine was introduced in 1940. This engine is based on the Model N block but it is equipped with a suction feed, constant pressure fuel system designed to insure steady delivery of the fuel independent of the level of fuel in the tank This was an attempt to use a larger fuel tank on suction feed engines which are notorious for performance changes due to the fuel level in the tank. This picture shows the engine as found.
This is the same Model U engine shown in the previous picture after restoration. The engine was completely disassembled and cleaned, the valves were ground, cylinder honed, rust removed, and gas tank repaired. The engine was then repainted and was ready for show.
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