Hi valve guide,
I have had a few different models of 47 over the years. Have just changed my 3 B1 for a G5.
3B1 was good machine apart from 5 minute warm up and shut down, as opposed to 3 mins on G5. Turbo certainly uses more fuel and should you need to have it o/hauled or fixed, good luck !
A good 435 engine should give you plenty power in this country.
As for fuel consumption, I stick my head in the sand, as if I knew exactly how many litres per hour I was chewing thru, the smile that goes with 47 flying, would not be quite so wide !
De-turbo'ing 3B1 has been done in UK before, on the 47 for sale at Heli-Air, so should be ok as far as CAA is concerned. Good luck.
