Johnson Motors Service Promotion letterhead
SERVICE PROMOTION BULLETIN #214

OIL AND SCUM ACCUMULATION — TEST TANK

Original photograph or illustration from Johnson Service Promotion Bulletin #214

Under conditions at their very best, oil and/or scum are bound to accumulate on the surface of water in the motor test tank — the busier you are the faster it accumulates to “mess” up any job installed for test, check or demonstration purposes. And, it takes time during a busy day to run it off through the overflow.

G. J. Lupo (Miller Appliance — Marine Division), Norco, Louisiana, has solved the problem of a quick “skimming” operation — did it with a simple and easily constructed spatula.

Built with a frame of 5/16-inch cold rolled or flat stock about 12 × 18 inches to which is soldered ordinary window screen and a slightly larger piece of tubing for the handle as shown here.

“Takes just a minute or so to skim the tank clean,” says Mr. Lupo, “and, if you’re on a water meter, saves water too.”

Very truly yours,
JOHNSON MOTORS

Jack Penland handwritten signature

Jack Penland
Service Promotion Manager

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