to much oil!!! wont run

well i just finished rebuilding my engine top and bottom end and i started it up the other day and ran for 5 minutes no problem so i shut it off. Started it up again the other day and no problem.

Then today i went to the gas station got gas to fill up the tank and added some oil to the mixture (bombardier says to after you rebuild an engine) and now the sled starts up and then dies like it is getting flooded. I put new spark plugs in and it ran for about 30 seconds then died. Then i pulled the spark plugs again and white smoke was coming out of the holes (vapour) so I pulled off the head and there was a lot of oil ontop of the pistons but everything looked good either than that.

So what are my options here

am i running to rich with oil?
to rich with gas?
are my carbs out of adjustment?
Should i drain the gas and put straight gas with no oil added?

let me know what you guys think !!!!I want to go sledding tomorrow for the first day of the year!!!!

i adjusted the cable to 18mm so that is alright. Is there any other way to adjust the oil pump?

for adjusting the cable would 19mm cause less oil to go in? and 17mm cause more oil?

o ya sorry 2005 mxz rev 800

i put about 500ml into the tank.