Alan,
I find my McCulloch MT 320 notoriuosly hard to start after refuelling, especially if it's hot. You have to press the fuel-priming bulb seriously hard to get fuel through (about 10 times) and start on half-choke.
Where the hell are the answers on this website. All I see are questions and adverts.... Hmmm?
Colin Rees, Swansea, Wales. UK, April 2007