its a 50hp yamaha 2 stroke virtually brandnew been cranked about 30 times total ....i go every sat or sunday .....i prime the bulb till tight and choke but it wont turn over till about the 10 try,,,,,,,,,,now after it turns once i can breathe on it and the thing will fire up , please help i hate being dude at the ramp who cant get his motor cranked ,,,especially when ive got a brand new one !!!!

sounds like and issue I would bring up with the dealer. It should be under warranty if it is new.

Check your fuel line, conector, bulb, if everything is fine then ---> better take it to the dealer, there are lots of reasons why an engine won 't fire up fast:

Bad gas pump

Clogged carburator

Dirty spark plugs

Accelerator

Choke

I had the same problem with my outboard, 1-2 pulls and it fired right away and then one day I began having trouble, it turned out to be dirty spark plugs. Now I 'm having the same problem again, time to take it for service.

what getsme is after it is started for first time i can breathe on it and it fires right up all day and nextday two but if it isnt used for 4-5 dsays it wont start for the first 5-9 cranks !

I had an identical problem with a new 50 hp Mercury 2 stroke about a year ago.  I took it back to the dealer who said that something in the choke wasn't right.  He fixed it and now it starts as well as any 2 stroke.

I'd say take it to the dealer.

You've got to figure out if your flooding it and having to clear the excess fuel before it will start or if you don't have enough fuel in it and it's having to prime the crankcase. My guess would be it's having to prime the crankcase with enough fuel to start.

I don't know if you motor has a choke or a primer system. A choke blocks off the venturi in the carb and engine vaccum pulls fuel from the carb into the motor. I not fully closing it takes a lot motor cranking on the motor to get the crankcase primed. Primer systems use the fuel pump to pump fuel into the motor and a lot of times people don't hold it long enough while cranking the motor over to pime the crankcase.

After the motor sits for several days all the fuel vapors inside the crankcase have totally evaporated so it takes a pretty good initial charge of fuel to recharge to crankcase. That's why it starts easily after having been run and don't want to start after sitting several days.

Also, it's a lot less misleading if you say the motor won't start. When you say it won't turn over makes it sound like the starter is not is not doing anything the the motor or it's not spinning the motor. A motor that won't spin over or crank is a motor that the starter won't spin. A motor that won't run is a motor that spins over/cranks but won't run.

Either way, a brand new motor, I would be asking the dealer. It could be something not working properly or it could be you haven't figured out the proper way to do a cold start.

It's not unusual for a Yammie to be stubborn to cold start.  Mine is the same way though 9 - 10 trys?  Nope.  Starting my motor after it's sit is a little bit of fiddling with the cold throttle lever and the choke.  Once the engine has run that first time it turns right over the rest of the weekend with ease.

... but if it isnt used for 4-5 dsays it wont start for the first 5-9 cranks !

It seems to me that you just found the problem.  

well thanks for the help ,,,,,saturday i primed the bulb until firm and and pushed choke in and second try its running,,,,i may have been flooding it ,,,i have a yamaha 4 wheeler that is a cold starting rascal as well !!!!thx for yalls help it cleared things up for me