RC Car Fuel System
thingiverse
This is not for real petrol but for water. you get a Lego Technic pneumatic pipe an put it in the small hole and the exhaust on the other when a belt is connected to the pulley the pump will spray water droplets out the exhaust so it looks realistic i will be printing this soon there is a small fuel tank which you can use if you do not have one which will fit the Lego pipe fine.
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