Hi wce,
E-go are very good, you must ensure though that the mower is empty of all fuel and oil and has been flushed out so that it is not classed as DG (dangerous goods)
Also you should apply a tag stating what's been done as far as flushing is concerned so that there's no confusion when it's in any transport depot.
E-go are an online only service that utilises the "Hunter Group". They provide an Australia wide service.
Cheers,
BB.