I am a local mechanic on my towns lawn equip. ,I have seen some nasty snot!
Most of the people that brought their stuff to me ,90% of it was do to sitting ,an also the enviorment conditions
where it was stored ,like a lawn mower sitting outside under the eve of a house were the rain water runs off ,or
in the hot brutal sun were the plastic fuel tank collects moister ,an also ,from them putting their blowers ,weed
eaters an saws up for the winter ,these ,the carb dries up an hardens ,or the tank starts to build up pressure an
distorts the diaphrams!
The mowers have a fuel bowl ,so the fuel an built up compensation gunks up the carb!
Most of the stuff that is brought to me ,really don't need parts ,but just cleaned from sitting other than
the accessional carb kits.
I tell people that the down time is actually what is killing their equip.!