Raven 2 starting problems
If you are starting your Raven 2 according to the book and it is still proving hard to start it is a fair bet that the mixture thingo needs adjusting. This should be checked by the engineers probably every couple of hundred hours. They have to check how much fuel is going into the FCU when the pump is going or something like that. I know it can make a big difference.
Also sometimes a very warm start is best handled with mixture rich using the cyclic start button and modulating carefully the throttle opening.
A chap earlier said to listen to the engine, thats exactly right as sometimes its firing but it seems like the starter being engaged is stopping it from getting over the bump to smooth running. You can hear the engine popping away quietly and when you take your finger off the starter and pay more attention to throttle opening it gets going better.