Call it a Massey-Montgomery

What to do when you're tired of idling

| August 2006

The question that faces many of us in the old engine hobby is: What can we have our engines doing besides just idling? Most of us have probably been amazed from time to time at the creative engineering we have observed at engine shows. This is in addition to the factory designed pumps, grain shellers, wood saws, light plants, etc.

Here in the north, where the show season is short, we have a lot of time to attempt to be creative. During the winter of 2005/2006, my attempt to put an engine to use resulted in this Massey-Harris-powered AC generator.

This engine was made by Cushman to be sold in Canada as a Massey-Harris. It is identical to a Cushman Cub. I bought it from an antique dealer in Quebec, Canada, as a non-running unit in the late summer of 2005. The work needed to get it running involved a thorough fuel system cleaning with acetone, as the old gas had turned to rusty gum. Two other small problems were setting the ignition timing from an extremely advanced position (causing it to kick back even with the timing lever fully retarded), and fixing a broken speed adjusting screw (which held the governor on wide open throttle). That was all that was required to get it running. It appears to have nearly all of its original green paint and all of the silk-screened Massey-Harris lettering with scrolled pinstripes on the front of the block. The addition of a new muffler (with no modifications to the engine exhaust port) from a Kohler-powered John Deere lawn tractor makes for a quiet-running unit.

The 115-volt, 2-kilowatt AC generator was originally belted to a single-cylinder Wisconsin air-cooled engine that was not running. The tag on the generator says, "Montgomery Ward Powerlite." Vintage is unknown, but probably 1950s.

Both engine and generator had V-belt pulleys attached when acquired, so the question was: How could a 2 HP throttle-governed engine that is rated to run at 750 RPM operate an AC generator that attains standard output voltage at 3,600 RPM? We all know the answer to that: Given enough time and money, most anything can be accomplished!

Once the correct pulley diameters were figured out, I had planned to just change the engine pulley to keep the cost down and the project as simple as possible. But a mechanic friend happened to be around while I was laying out the project and he thought out loud about the procedure. He said, "Why don't you make a line shaft between them to increase the 'cool factor' and have more action visible?" After the math was refigured so the original pulleys could be used as is, the line shaft idea was developed.


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