push-start
US /ˈpʊʃ.stɑːrt/
UK /ˈpʊʃ.stɑːrt/

1.
to start an engine, especially of a vehicle, by pushing the vehicle to get it moving and then engaging the clutch to turn the engine over
:
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We had to push-start the car because the battery was dead.
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Can you help me push-start my motorcycle?
1.
the act of starting an engine by pushing the vehicle
:
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The car needed a push-start to get going.
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A quick push-start got the old truck running again.