On all my yard equipment, I use the large (translucent) filter (don't know the mesh size though).
I also route the fuel line for a bit of a loop so as to include the fuel shutoff valve.
Like Manic84 said, run the carb dry after each yard mowing.
Do a full cleaning and rebuild on the fuel system.
(tank, hoses & carb + new air filter)
then...
Each time you get out the mower, tiller, pressure washer, etc, out...
First thing is to flip the fuel valve open.
Then top off the tank and check your oil.
Carburetor will be full and ready to go by then.
Usually takes a single pull to start. Even that first run of the season!