Found another Scotty 45 14" but its an electric version on eBay

eBay Link

1. Can these be modded to fit a petrol engine?
2. Are parts from the petrol versions similar?
3. What replacement 240v engines can I use if this one fails?

I don't have a relatively large lawn currently only about 180sqm of lawn which is not much approx 8x10meters smile so the power lead is not a problem.