A different opinion on starting fluid:
I personally have been using starting fluid for about 60 years, on gasoline engines only, from small 1-cylinder weed-eaters to my 450 HP GTO.
To date, ZERO problems.
I have found that engines that have been sitting for a couple of months that absolutely will not start on stale fuel, will start and then run (albeit not really well until hot) to burn out the stale fuel. I also have not had to replace a starting motor on ANY of these engines (due to excess cranking) in that 60 year period.
So, am I recommending starting fluid to everyone, NO, I am not. The above is personal experience only, not professional advice. But I will continue to use it.
And, no offense meant to you, but your choice of carburetor will prohibit me from offering any additional advice in this thread. Hope you find your answers.
Jon.