pony engine
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English[edit]
Noun[edit]
pony engine (plural pony engines)
- A small locomotive used for shunting wagons, etc.
- Synonyms: shunter, shunting engine, switcher
- (Canada, US, dated) A small gasoline engine serving as an auxiliary to a diesel engine (mainly in older designs from the 1930s to 1950s), providing heat to warm it up and, when engaged with a clutch, providing cranking to start it up.
- Synonym: pony motor