Why can't my Iwaki 100 power 2 becketts?

[KenT]

Do they have to be excactly the same height? Right now they are midway up the skimmer. 1 works better than the other. If I turn the better 1 down, neither work well.

This is on a 6' aerofoamer 848.

Thanks

 

[mflamb]

Contact the manufacturer for diagnostic assistance.