I have a 93 40hp mercury, 4 cyl 2 stroke. It was recently rebuilt but the carbs weren't. It is the hardest motor I've ever tried to crank. I have to choke it while turning it over and sometimes put it in neutral giving it gas before it will hit. If its hot and only been shut off a few minutes it will start right up. Otherwise I have to go through the whole deal all over. I took one of the carbs off last week. It looked clean except for what looked like a little tarnish looking spot in the needle seat. I tried to get that out. The rubber tip on the needle also had a pretty bad impression from the seat. A freind told me if the rubber tips have a impressions I should replace them. I think I'm gonna order complete kits for both carbs and start fresh. I just wanted to run this by yall incase you had any other better advice. I've rebuilt carbs before, but never on a mercury. Is there anything special I need to know? Thanks.