You could always read the POH and see what it says.
For example, you shouldn't firewall the throttle in a Tomahawk with the carby heat hot, you can get a lean cut as there is no accelerator pump. So I teach to check for ice on downwind and then leave well alone (as per POH)
Just another point, it's been a long time since I had the pleasure of flying an Islander, (I no longer have that kind of upper body strength.....) but I could have sworn it was fuel injected........?