My 75 merc 850 starts fine in the morning before we go out and runs perfect all day till we shut it off for 30 -45 minutes or so to fish....then its hard to start...will not even try to start till I hit the choke then it tries to start and eventually will with choke.....also I noticed when its warm the bulb will not get hard,this could be normal not sure...bulb gets hard in the morning for first start up and after I get home for motor washing out...starts right up.......also when I am out if I shut if off for 5-10 minutes it fires right back up.........Thanks in Advance you guys are Great Prob solvers