runs rough then great!

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    07 Wake 155 runs rough until warm up

    Runs rough then great I have an 07 Wake 155 SeaDoo PWC. If it is not run for a month, it runs very rough when first started and continues until it is warmed up. When I open up the throttle, it hestitates, goes, hestitate, goes ... until I run it for a few minutes. It then eventually runs...