So how do you think a std tyre plug works ?
Even more so on a mower cause I have never taken off a tyre that was not filthy inside.
Very rarely do car type plugs work in mowers because most rely on the heat generated in the tyre to fix them which does not happen on mower tyres.
Further more most mowers are between 10 psi to 20 psi and I doubt that there will be enough pressure to keep the mushroom head in contact with the tyre.
Finally most of the holes I get here are cuts not strait holes so I doubt the mushroom head will be big enough to work.
In the shop are both North Labs plugs and Perma fix tractor plugs for really large holes.