I want to use a power sprayer to apply deck stain to the rails and
vertical parts of my deck but will apply stain with a roller for the
flat parts of the deck. Plan to use Penofin. Does anyone have any
experience with power sprayers for this purpose (not pump) that will
work without clogging and with little overspray? Can the stain be
diluted and what is used to dilute it? Thanks for any advice.

why dilute it stain is always thinner than paint it wont be a problem
spraying,