Each year at the Midwest Old Threshers Reunion in Mt. Pleasant, Iowa, a gas engine manufacturer is chosen to be featured. The featured engine program has enticed exhibitors to bring a number of excellent engines to the show over the years, and several strive to have a featured engine each year. For the 2021 show, the Brownwall gas engine was selected; the Brownwall Engine Pulley Co. manufactured engines in Lansing and Holland, Michigan. There were 14 Brownwall engines on display at the show. All were of the smallest offered size, 1 to l-l/2hp. It was an even split between air-cooled and hopper-cooled engines at seven each. Five exhibitors brought a pair to the show, air- and hopper-cooled. Three of the hopper-cooled engines had a Webster magneto ignitor set up.
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