And for those people 'fond' of using the carby heat at 'low level' because they may have been 'taught to'....
'Tis worth remembering that the use of carby heat delivers hot UNFILTERED air into the carby from the shroud around the engine exhaust.
Beware of 'overuse' in dusty conditions, as you may very well wind up with scored cylinders....I have seen a C150 used for mustering up near Carnarvon in WA where the pilot employed used the carby heat 'on' all day at low level, because that's what he was taught.....
This particular engine was replaced on the next 100 hourly because of.
No cheers there.....