First start on the formula z 670 is 2 primes 2 pulls. I can ride all day but 10 minutes after I shut it off it take 45 minutes to start. Pull plugs sometimes they're wet most they're bone dry. Light cylinders and they burn out fuel for awhile the voom it blows blow out. Replace plugs and get on pull it kind of starts but dies right away. Pull plugs there soaked or dry. Cleaned carbs pump new lines nipple caps. I'm out of ideas. Could it possibly be the rotary reed. Or low spark, low compression. If you have fixed this problem msg me a email or number so I can call for help. Any input will help. Thanks fellow sledders. Pulled carbs off today when it did it and pulled once and started but threw fuel and oil out of carb holes. Is that normal?