Automatic Cutoff Turns Off Water Pumping

178

01:30:42

Your portable gasoline powered water pump is filling the stock tank.  If we run insulated wire from spark plug to insulated holder on tank at the water level we wish to fill the tank, the gasoline engine spark plug will short out and stop running when the water level reaches the bare end of insulated wire from the spark plug.

published 7 years ago

2ctiby

7 years ago

Keeping the contacts of the spark plug shorted by the water may cause a burn out of the ingition coil. Also, the water contact may be an unwanted instantaneous high-voltage risk through the water at the instant of water contact. There are better ways, using say a 555 as water level detector to operate cutoff and replenishment of a pump rather than using such high volts.

BillyT

7 years ago

Drinking water has an average resistance of about 80k sulage is about 20k, stock water could be somewhere between, the chances are that the pump won't stop and the stock might be in for an unpleasant surprise...

lmccoig

7 years ago

Spark plug gap is not in water. It is spark plug voltage shorted to ground. Stock water is more contaminated than potable water. Simple gas engine should stop as old mowers where you pushed shorting strip against top of spark plug.

dad123

7 years ago

i would use to float, normaly closed until raised. so when the water reaches a given height it breaks the circuit to the spark plug. you could short the plug to ground but that will pull a lot of amps and ware out your float, circuit would look something like this.http://everycircuit.com/circuit/4536649936797696

BillyT

7 years ago

@dad123 stated a float system would be best, a water contact system, while it looks good in theory is a lot more complicated than the circuit presented. Here is a basic float system. http://everycircuit.com/circuit/5115819030478848

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