the sticker on the power head says this end up with an arrow. that would be the piston end. the owners manual seems to show the same but also says for long term storage storing the powerhead vertically is fine. I take it vertically is the same position that the auger would be used in. or am I wrong?
I called eskimo and the guy on the other end didn't seem to know much but he did say long term to do as the sticker on the unit says, and short term any position is fine. a 12 hour day out fishing is considered short term.