Some guys install an electric pump as an auxillary to prime the carb if it's been sitting for a long time rather than cranking the motor over.Is there a switch to turn it on-off somewhere?
Yes and that's exactly what I use it for. But now I'm afraid that I will damage the mechanical fuel pump like redfastback said. I've never heard of that but I have never seen a fuel system with both mechanical and electric fuel pumps either.