fuel sending units/Shadin totalizers

[Mark Hislop]

I have the Shadin unit, and I love it. It is always close in agreement with the fuel I put in (I always top off the tanks). However, be careful using a fuel totalizer in place of the gages. The totalizer only keeps track of the fuel used by the engine. If you are losing fuel through some other means (a broken fuel line, a loose cap, or a leak) the totalizer won't indicate that. I know this from experience when I had a leak in the diaphragm of a fuel pump in a Seneca. I was crop dusting the local countryside with fuel. Fortunately I noticed the dropping level of the gage in time to land with plenty of fuel aboard.

Mark