Usually it will be a gummed up carburettor.
Go to
Carb cleaning and follow the directions for either one of the Honda carbs.
Although neither is your exact one, the cleaning process will be the same.
Generally gum builds up over winter and blocks off the main jet which you need to unscrew to clean properly.
It is also a good idea to push out the emulsion tube and check all of the little holes are clean as well.
Down here Honda fit taps eother to the carb itself or to the fuel line and it is always a good idea to turn the tap off on the last mow of the season & let the engine starve so there is no fuel left in the cab over winter.