The simplest solution is to
not leave gas in it if it's going to sit....especially "for up to a year". That's ridiculous, and an equipment dealer ought to know better.
Not only that, but a manufacturer
will not pay warranty claims submitted by a dealer for work that has been done to correct improper storage practices. We get asked all the time to go to bat for the customer and submit claims like that, but we always say no. Manufacturers lay out procedures in the product manuals for storage. If the end-user, (or the
dealer!), makes the decision to drop the ball and not follow those recommendations, it is
not up to the manufacturer to pay the bill.....just like it's not up to the manufacturer to pay the bill if a machine is used improperly. Simply stated, neither situation represents a defect in materials or workmanship....and
that's what warranties cover.