I remember old gasoline inboards that went "pocketa, pocketa, pocketa".
What you want is an old low compression, low rpm inboard engine - gas
or diesel. If you're really keen on cheap, then a home built propane powered
steam inboard like the one they faked on the African Queen will provide
the "poketa pocketa pocketa". Someone who posted here said the African
Queen had a gasoline engine in the film.


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