i have a murray3.5hp classic that doesn't want to stay started?

my lawn mover doesn't want to stay started after i cuts out it won't restart un less you spray carb and choke cleaner how can i fix this problem murray 20" 3.5 hp classic
Jackie, July 2005
adjust the tickover and check cable throttle adjustment .Refill with fresh petrol if petrol is over 6 weeks old good luck

ian m, August 2005
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