On 17 Sep 2021, nristen said the following...
My dad use to tell me that urban legend had it that there was danger getting your arm broken if the vehicle backfired. I always thought th
My father taught me to make sure my thumb was on the same side of the crank handle as my fingers to protect against backfiring. I never experienced a backfire though and am not sure how well changing your
thumb position would protect you.
That is good advice, as if the engine kicks back you could break you thumb.
You should also do this is driving certain vehicles, Army Jeeps being one, as they can break fingers/thumbs if they hit a bad pothole or blow a tire.
Also when you hand-prop start an airplane, which done wrong can have horrible consequences, yet I flew a starter-less plane for years, and had to hand-prop it every time.
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