I guess I have been fortunate with all of my older machines. None of them have ever backfired after a shutdown. Of course, I idle all of them down for a brief period before shutting them down. It's a short cool down. It's the little things like this that make the difference. Also, I engage the electric PTO's at a low engine speed, then place the engine to full throttle to mow.
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582, 682, 782, 782D, 1282, 1050, 1210 x 2, 1711, and 1811
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