The hovercraft will carry you over the mud swamp to reach the crashed saucer Excalibur.
(see related question)
Go to the mud and you'll find it there. As soon as you fuel it, it stays right there in the swamp.
You can't get the hovercraft from inside. Unlock the gear lock and go outside. Climb on the windmill arms and turn them counter-clockwise. This opens the roof dome.
The hovercraft (hover board) runs on manure, so get some from the farm and add it. The hovercraft will go directly to the mud swamp, which is the only place it will work.
To obtain manure for the hovercraft fuel in Poptropica's Astro-Knights Island, go to the farm on the main planet and explore the barn. You will find an item called "Excrement" there which can be used for the hovercraft fuel.
You first get the manure then you make the mill turn right then entert the top and go to your bag and hit use on the manure
The hovercraft is in the attic of the Mill. To get it, pull the short rope in the mill loft, then go outside and turn the windmill arms counter-clockwise to open the roof dome. Add manure to the hovercraft, and it will go directly to the swamp (the only place that it works).
To get to the hovercraft in the attic of the mill, pull the rope to unlock the gears. Then go outside and turn the windmill arms by jumping on them. When they turn counterclockwise, the roof dome will open. Add manure to the hovercraft and it will go to the swamp.
The hovercraft (hoverboard) is powered by manure. To get into the attic of the mill, pull the rope inside to unlock the gears. Clmib on the windmill arms and turn them counterclockwise to open the roof dome.
You can get to the hovercraft (hoverboard) in the mill attic. # Hang on the little rope to unlock the mill gears. # Go outside and climb on the windmill arms, turning them counter-clockwise # When the dome opens, go in and add manure to the hovercraft. (it will go to the mud)
When you get the windmill open on astro knights, you go inside and get the (manure-powered) hovercraft.
You use it to fuel the hovercraft (in the attic of the mill). Go inside and unlock the gears, then outside to jump on the windmill arms (turning them counter-clockwise) until the dome on top is open. Use the manure and the hovercraft will automatically go to the mud area.
To see the solar system on Astro Knights island, go to the Planetarium. (not part of the game, but an interesting view)