I have a Husqvarna HU800AWD mower with a Honda GCV190 engine. I've ben told this mower MUST use:
92 octane gas with NO ETHANOL
5W-30 full synthetic motor oil
NKG 509 spark plug
I must ad 1 or 2 fuel filter in the fuel line
Must use a high capacity air filter with a pre filter in front and back of the air filter
Is any of this necessary?