I have two different questions here...

1st- what is the safe range for waterpressure while running at higher speeds.

2nd- My motor will start first key turn the very first time, doesn't matter if its January or July put it in the water and she turns over and starts the first lick and purrs like a kitten. But make at run down the lake and fish, then it hardly will not start back. I have to choke it and give a little thorttle all at the same time. Then when it starts it smokes and shakes and ties to bog down, what is the deal? Drives me insane!!!!!! What do I need to do to fix it?